Gymnetini, Schenkling, 1921

Micó, Estefanía, Eugene Hall, W. & Ratcliffe, Brett C., 2001, Descriptions Of The Larvae Of Hoplopyga Singularis (Gory And Percheron) And Hologymnetis Cinerea (Gory And Percheron) With A Revised Key To The Larvae Of New World Gymnetini (Coleoptera: Scarabaeidae: Cetoniinae), The Coleopterists Bulletin 55 (2), pp. 205-217 : 207

Key to the Known Third Stage Larvae of New World Gymnetini

(Modified from Morón and Ratcliffe 1984)

1. Palidia present --------------------------------------------------------------------------------------------------------------- 2

1'. Palidia absent ------------------------------------------------------ Gymnetina cretacea (LeConte)

2. Raster with each palidium consisting of 2 or more irregular rows of pali. Last antennal segment with 3–7 dorsal sensory spots. Haptomeral process absent -------------------------------------------------------------------------------------------------------------------------------- 3

2'. Palidia monostichous. Other characters not as above ------------------------------------ 5

3. Tarsungulus with 7 setae ( Fig. 19 ). Maxillary stridulatory area with 5 irregularly spaced, close­set, low teeth ( Fig. 25 ). Last segment of antenna with 3 ventral sensory spots ( Fig. 20b ) ------------------------------------------------------------------ -------------------------------------------------------- Hologymnetis cinerea (Gory and Percheron)

3'. Tarsungulus with 10–12 setae. Maxillary stridulatory area with 7–9 regularly spaced, high teeth. Last segment of antenna with 5–13 ventral sensory spots ---------------------------------------------------------------------------------------------------------------- 4 ( Cotinis )

4. Raster with inner row of each palidium set with pali only slightly larger than those in outer row ---------------------------------------------------------------------- C. nitida (L.)

4'. Raster with inner row of each palidium having 7–10 pali much stouter and larger than other pali -------------------------------- C. mutabilis (Gory and Percheron)

5. Transverse haptomeral process present ---------------------------------------------------------------- 6

5'. Transverse haptomeral process absent ------------------------------------------------------------------ 8

6. Dorsum of abdominal segment VII with 3 annulets. Last antennal segment with 10­15 dorsal sensory spots ------------------------- Argyripa lansbergei (Salle´)

6'. Dorsum of abdominal segment VII with 2 annulets. Last antennal segment with 3 dorsal sensory spots ------------------------------------------------------------ 7 ( Hoplopyga )

7. Right mandible with 2 scissorial teeth. Haptomeral region with cone­like haptomeral process over a transversal row of 8–11 heli --------------------------------- -------------------------------------------------------------------------- H. singularis (Gory and Percheron)

7'. Right mandible with 3 scissorial teeth. Haptomeral region with a transversal row of 17–19 heli, cone process absent ---------------------------------------------------------- ----------------------------------------------------------------------- H. brasiliensis (Gory and Percheron)

8. Maxillary stridulatory area with a row of 3–5 teeth. Tarsungulus bearing 10­12 setae ----------------------------------------- Gymnetis flavomarginata sallei Schaum

8'. Maxillary stridulatory area with 6 or more teeth. Tarsungulus with less than 10 setae ------------------------------------------------------------------------------------------------------------------ 9

9. Maxillary stridulatory area with row of 7 teeth. Tarsungulus bearing 6–7 setae -------------------------------------------------------------------------------------- Blaesia atra Burmeister

9'. Maxillary stridulatory area with a row of 9 teeth. Tarsungulus bearing 5– 6 setae ----------------------------------------------- Marmarina tigrina (Gory and Percheron)

Figures

Figs. 16–21. Hologymnetis cinerea, third instar larva. 16) Frontal view of head; 17) Palidia; 18) Thoracic spiracle; 19) Tarsungulus of anterior leg; 20) Apical antennal segment, dorsal and ventral views; 21) Right maxilla, hypopharyngeal sclerome and labium, ventral view.

Figs. 22–26. Hologymnetis cinerea, third instar larva. 22) Epipharynx; 23) Dorsal view (a) left and (b) right mandibles; 24) Ventral view of (a) right and (b) left mandibles; 25) Stridulatory area of maxilla; 26) Apex of right mala showing unci.