Macralonidea hyalinus, Usinger, 1946

Usinger, Robert L., 1946, Hemiptera Heteroptera of Guam, Insects of Guam II, Honolulu, Hawaii: Bernice P. Bishop Museum, Bulletin 189, pp. 11-103 : 60-61

55. Macralonidea hyalinus , new species ( fig. 14 ).

Elongate, parallel-sided, nearly naked above, the head small, transverse, first antenna! segment nearly as long as pronotum, second half again as long as first, third about as long as first, fourth less than half as long as third. Rostrum reaching to hind coxae. Pronotum narrow anteriorly, broadened and strongly convex posteriorly with distinctly punctate disk. Hemelytra hyaline. Wing cell without a hamus. Female ovipositor extending backwards four fifths of total length of abdomen.

Female: head transverse, shining, impunctate, one fourth broader across eyes than greatest length, strongly declivent anteriorly, tylus swollen at middle, narrowed anteriorly, juga and lora only feebly convex. Interocular space scarcely wider than an eye, 12: 11,the vertex very finely longitudinally sulcate. Rostrum exceeding middle coxae but scarcely reaching hind coxae, proportion of segments 19: 17: 13: 18. Antennae shorter than body to tip of membrane, 163: 186, first segment thickest, shorter than pronotum, 39: 45, second over half again as long as first, third subequal to first, fourth less than half as long as third, proportions 39: 67: 40: 17.

Pronotum broader than long, 52: 45, strongly narrowed anteriorly, the anterior margin being less than half as wide as hind margin across humeri, 24: 52, sides strongly narrowed, subparallel at and in front of callosities. Hind margin feebly concave in front of scutellum, then somewhat rounded to humeral angles. Disk strongly convex, especially posteriorly, rather uniformly, densely punctured throughout except narrowly sublaterally on humeri, narrowly along an ill-defined longitudinal carina at middle and on callosities, these distinct, depressed near middle and separated by an elevated area, convex laterally and practically reaching obscure lateral carina, as wide as anterior, punctate collar region.

·Scutellum a little broader than long including mesonotum, 24: 20, with a puncture on either side of middle of hind margin of mesonotum. Disk impunctate, moderately elevated, subflattened anteriorly at middle, gradually depressed on apical third, the sides of disk roundly depressed and margined with deep punctures or depressions separating eight rounded lobes on either side before depressed apex.

Hemelytra greatly exceeding apex of abdomen, the apices of cunei nearly reaching abdominal tip; hyaline or subhyaline, with coarse punctures along claval suture. Corium without discal veins, large membranal cell reaching slightly beyond middle of membrane, rounded at inner angle. Costa! margins nearly parallel, scarcely arcuate beyond middle.

Under surface with short hairs posteriorly and on legs; impunctate except on prothorax. Abdomen very deeply emarginate to accommodate long ovipositor, only the first, second, and very narrow third ventral segments visible at middle. Tibiae without stiff spines or bristles, the hind tarsi with very minute brown spots. Arolia free, divergent, reaching nearly to apices of claws. Last segment of hind tarsi longer than the preceding two together, slightly enlarged apically.

Color ochraceous with fulvous anteriorly on head, brown eyes, dark brown apex of second antennal segment and all of apical segments except for narrow white base of third. Pronotum with brown humeri and a brown fascia on either side of middle near hind margin. Scutellum yellow with black base (mesonotum), an ill-defined brown line along middle, and brown apex. Hemelytra clear, hyaline, the,inner margins of clavus broadly dark brown to black, the outer punctate margin of clavus brown. Corium pale along costal margin and narrowly at apex of clavus, elsewhere along inner and apical margin brown. Cuneus dark brown at inner base, pale along outer margin. Membrane clear. Under surface mostly pale, brown at middle of abdomen. Apex of rostrum and tarsal apices brown.

Size: length 4.65 mm., width (pronotum) 1.3 mm.

Holotype female, and three female paratypes, Ritidian Point, June 2, on paipay ( Guamia mariannae), Usinger ; one female paratype, Tarague, May 17, Usinger .

Macralonidea Hsiao was recently described ( U. S. Nat. Mus., Proc. 95: 372, 1944), based upon the single new species, M. cyanescens Hsiao, from Borneo. Cyanescens is larger than hyalinus and has the anterior lobe of the pronotum strongly narrowed, almost collar-like.

Figures

FIGURE 14.-Macralonidea hyalimts: dorsal view of female.