Head buff yellow, lighter laterally and ventrally, yellowish brown laterally, 

 near the occipital foramen and adjacent parts on the dorsal side; dark 

 spots between the eyes, near the base of the mediolateral setae of the fronto- 

 clypeus. Seta on the dorsal side of the sensilla of antennae long, curved 

 inward (Figure 430). Lateral anterior -margin seta of frontoclypeus thin, 

 curved inward; the 2 other anterior -margin setae are thick; frontal setae 

 and setae 7 and 10 slightly curved and inclined forward; setae 12, 13, 16 

 and 14 dark and strong, relatively short; seta 15 slightly longer than the 

 others; seta 9 is the longest seta of the head, thin, straight, 2.5 times as 

 long as the width of the head; near it is the small thin seta 11; seta 17 

 situated near the bifurcation of the frontal sutures. 



Lateral margins of labrum (Figure 431 ) rounded; dorsal sclerite with a 

 broad, median notch; posterior -angle sclerites curved; the end of the two 

 longitudinal folds of the ventral surface of the labrum projects forward in 

 the median notch of the membranous part; two pale, broad processes with 

 thin pointed ends project laterally; there are two rows of short, dark spinules 

 which converge in the middle, near the anterior margin of the labrum; there 

 are longer hair like spinules laterally. 



The projecting upper and lower blades of the left mandible with small 

 teeth; brush of hairs in the median depression consists of two tufts; right 

 mandible with 3 teeth distally, two of them on the upper blade and one on the 

 lower blade (Figure 432); outer setae relatively long and thick and curved. 

 Submentum with slightly concave anterior margin and strongly convex 

 posterior margin (Figure 433); 2nd and 3rd segments of maxillary palps 

 fused; last segment of palp with 5 sensillae; labium slightly laterally 

 compressed; mentum short and broad. 



Pronotum covering the anterior part of the segment completely, meso- 

 and metanotum with an anterior, membranous area (Figure 434, A); prono- 

 tum extending farther laterally than meso- and metanotum; the pleural 

 sclerites of meso- and metathorax are therefore wider than the pronotum. 

 Each half of the prothorax bears 4 or 5 secondary anterior -margin setae, 

 a long and 3 or 4 short setae; one of the 2 secondary anterior-angle setae 

 short and the other small and setuliform, situated slightly away from the 

 anterior margin; 2 setae are situated at the sides of the sclerite; surface 

 setae situated in the middle of the sclerite, forming two groups; one of the 

 3 setae of the median group is thin and straight, longer than the others; the 

 other 2 are curved forward; the lateral group consists of two groups situated 

 obliquely behind each other. Meso- and metanotum with a long primary 

 anterior-margin seta; primary anterior -angle seta dark and strong; both 

 secondary setae situated close together, one slightly shorter than the primary 

 seta, the second much smaller; the 3 surface setae of the mesonotum are 

 situated close together, slightly farther from the posterior margin on the 

 mesonotum than on the metanotum. 



The distal seta of the trochantin of the prothorax (Figure 435) is situated 

 at a distance from its membranous apex; 2 setules are situated near the 

 anterior margin; seta of episternum of meso- and metanotum straight and 

 long (Figure 434, A); seta of epimeron of all 3 thoracic segments short and 

 thick, situated near the margin. 



The median sternite of the prothorax is rhomboidal (Figures 434, B, 436), 

 with a complex sculpture; the two posterior sternites are irregularly 



378 



