Hirmoneuropsis luctuosa (Philippi)

González, Christian R. & Carvacho, Camila, 2016, Redescription of the adult male and description of the puparium of Hirmoneuropsis luctuosa (Philippi) (Diptera, Nemestrinidae) from central Chile, Revista Brasileira de Entomologia 60 (1), pp. 19-23 : 20-22

Hirmoneuropsis luctuosa (Philippi)

( Figs. 1–8 )

Hermoneura luctuosa Philippi, 1865: 661

Hirmoneuropsis luctuosa n.comb. Bernardi, 1977

Material examined

Región de Valparaíso, 1 male El Granizo 2.XII.1952, E.Z.R. col.; 1 male El Salto 19.XII.1964 C. Vivar col. Región Metropolitana: Cordillera Province, 1 male Qda. Los Almendros (33 ◦ 43 Ɩ 50 ƖƖ S/70 ◦ 29 Ɩ 23 ƖƖ W) elevation 959 m, Reserva Nacional Río Clarillo, 4.XI.1997, P. Estrada col. Material examined deposited in the Instituto de Entomología Collection, Universidad Metropolitana.

Diagnosis

Body color grayish. Scutum dark-brown pollinose with long black hairs.Wing smoky without sectorial vein. Legs brownish-gray pollinose. Abdomen dark gray; first segment with tuft of yellowish, long and thin hairs on the lateral margin; lateral margin of tergites II–V with long and thin whitish hairs ( Fig. 1 ).

Description

Male. Body length: 10.5–13.5 mm; wing length: 12.5–13.5 mm. Head. Holoptic eyes slightly touching in upper ¼ with short abundant whitish hairs, ommatidia larger in upper 2/3–3/4; occiput grayish pollinose, with short whitish hairs, larger lateral to compound eye; ocellar tubercle raised, polished dark gray, with proclinate dark hairs; frons dark-gray pollinose; face brownish polished gray, with long whitish hairs around oral margin and long black hairs near margin of compound eyes and base of antenna ( Fig. 2 ). Gena with long whitish hairs. Antenna dark-gray pollinose; scape with black hairs on dorsal and ventral surface ( Fig. 3 ); pedicel cylindrical, with long, thin black hairs; first flagellomere ovoid and slightly flattened, 3× longer than pedicel; proboscis short, ½ the length of the eyes; palpus short, brownish-gray pollinose, with short, thin and sparse light-brown hairs. Thorax dorsal view: scutum dark-brown pollinose, with long, thin and sparse black hairs; notopleuron dark-brown pollinose with long black and yellowish hairs; scutellum dark-brown pollinose, with very long black hairs, and thin whitish hairs on base ( Fig. 4 ). Pleura: postpronotal lobe gray pollinose, with dense long, thin whitish hairs; anepisternum gray pollinose, with dense long, thin yellowish hairs, and very few black hairs; katepisternum gray pollinose, with long whitish hairs; anepimeron, meropleurite, mediotergite, laterotergite, metepisternum and metepimeron with long whitish hairs. Wing ( Fig. 5 ): smoky, darker in costal margin; C with delicate black bristles surrounding wing; cell sc and r 1 brownish completely; R 1, R 2+3, R 4, R 5, M 1, and M 2 straight and almost parallel to each other; without sectorial vein; CuA 2 and A 1 touching wing margin, cell cup open; alula hyaline; wing 3x longer than wide. Stalk of halter darker brown with delicate yellow bristles near base; knob dark brown on dorsal surface and light brown on ventral surface. Legs: grayishbrown pollinose; coxae grayish pollinose, with long, thin whitish hairs on anterior surface; trochanters with short white hairs on anterior surface; femora grayish pollinose with short, thin whitish hairs on anterior surface and long, thin hairs on posterior surface; tibiae I and II with delicate short black bristles on anterior surface; tibiae III with abundant short black hairs; tarsus with short, delicate light brown bristles on anterior surface, and short, strong dark-brown bristles on posterior surface, first tarsomere longer than others; pulvillus smaller than claws. Abdomen ( Fig. 6 ): dark gray; first segment with tuft of yellowish longer and thin hairs on lateral margin; lateral margin of tergites II–V with long and thin whitish hairs; tergites III–V with long and thin whitish hairs; sternites light gray, sternites with thin whitish hairs. Terminalia: dorsal view: epandrium short, broader than long, with long black bristles, basal margin concave, apical margin rounded; cercus ovoid-rectangular ( Fig. 7 ). Gonocoxite base broad with bristles elongated; inner gonocoxal process slender tapered apically with apex and curved upwards. Gonostylus elongated, slightly broader basally. Aedeagus with apical region upwardly arched down curved with rounded apex ( Fig. 8 ).

Description of the puparium ( Figs. 9–15 ).

Dimensions: body length 16.5–17.5 mm, maximum width 4.0–4.5, obtect, 4× longer than their greatest diameter, slightly arched dorsally and completely colored brown, more dark in the aster ( Fig. 9 ).

Head: narrower and shorter than thorax; vertical tubercle prominent and developed 0.86–1.06 mm arising at the base of antennal sheaths, antennal sheaths 0.74 mm long and 0.29 mm wide not touching the epicranial suture, prominent, irregularly annulate, widely separated, ventrolaterally divergent, longer than their basal diameter; maxillary palp poorly differentiated ( Fig. 10 ).

Thorax: each wing sheath with one tubercles positioned on the costal margin of the wing sheath ( Fig. 11 ). Thoracic spiracle 0.67 mm long and 0.21 mm wide, touching cephalothoracic suture, prominent. Legs reaching half wings sheaths; forelegs touching thoracic spiracle ( Fig. 11 ). Without other setae.

Abdomen: abdominal segments 1–7 each encircled by a row of spines; abdominal segments 1–7 with reniform spiracles in pleural region. T1–T3 with transverse row of 20–25 strong setae different size on anterior margin either side of midline; T4–T6 with two strong spines medially, and 3–4 smaller spines, tergite 7 smaller. Pleuron of abdominal segments 1–6 with 4–5 long, strong setae, and 2–3 smaller. Pleuron of abdominal segment 7 with a 5 strong setae, hooked apically, and 2–3 smaller. Sternites 2–7 with a row of 5–7 strong setae close to posterior margin, smaller than the pleuron. Sternites 5–6 short and with different-sized spines; sternite 7 with spines more developed, and two longer ( Fig. 12 ). Tergite 8 terminates in an aster of paired dorsal and ventral sharply pointed sclerotized tubercles; dorsal tubercles longest ( Figs. 13 and 14 ); anal tubercle with ventral preanal comb prominent, with two welldeveloped spines ( Fig. 15 ).

Figures

Figs. 1–4. Hirmoneuropsis luctuosa (Philippi, 1865). 1. Adult male; 2. Head of male frontal view; 3. Head of male lateral view; 4. Thorax in dorsal view. Scale bar= 1 mm.

Figs. 5–8. Hirmoneuropsis luctuosa (Philippi, 1865). 5. Wing; 6. Abdomen in dorsal view; 7. Epandrium and cerci (ce); 8. Gonocoxite (gc), inner gonocoxal process (igp) and gonostylus (gs). Scale bar= 1 mm.

Figs. 9–12. Pupa of Hirmoneuropsis luctuosa (Philippi, 1865). 9. Lateral view; 10. Head in frontal view (vt, vertical tubercle; as, antennal sheaths; es, epicranial suture; cs, cephalothorax suture); 11. Head and thorax in lateral view (ths, thoracic spiracle; wg, wing); 12. Abdomen in lateral view (fs, fringe spines). Scale bar= 1 mm.

Figs. 13–15. Pupa of Hirmoneuropsis luctuosa (Philippi, 1865). 13. Anal segment in lateral view (ds, dorsal spine; vpc, ventral preanal comb; vt, ventral tubercle; dt, dorsal tubercle); 14. Anal segment in ventral view (fs, fringe spines; vt, ventral tubercle; dt, dorsal tubercle) (scale bar =0.5 mm); 15. Anal segment of the pupa in posterior view (ds, dorsal spines; fs, fringe spines; dt, lateral tubercle). Scale bar= 1 mm.