3 (2). Pronotum shining, rust bi^own, darker posteriorly; mesonotum 



chestnut brown, grayish brown posteriorly; coxae and legs brown; 



Middle Asia 1. D. pugnax McL. (p. 446) 



4(1). Dorsal side of head grayish brown; light dots lateral to epicranial 



suture distinct, with dark outline; Middle Asia 



2. D. reductum Mart. (p. 450) 



1. Dinarthrum pugnax McLachlan 



Martynov, 1927:465-466, Figure 1, Plate XXI, 1-4. 



Pull-grown larva. Length 7—9 mm. Head (Figure 607, A) shining, golden 

 brown; dots yellowish, large, indistinct; frontoclypeus narrow, mainly of 

 uniform color, with wide, brownish, anterior margin with a transverse row of 

 6 light dots posteriorly, 2 large, median dots and 2 smaller dots laterally; a 

 small, light, median dot before the row. Yellowish dots similar to those on 

 frontoclypeus lateral to epicranial suture, including 2 oblong, anterior dots, 

 others round or slightly oblong transversely; numerous, small, yellowish 

 dots behind eye; ventral surface mainly brownish, lighter in middle; dots 

 yellowish, coarse, transverse, distinct. Gula oval, with long, curved sides, 

 and blunt, rounded, posterior end; anterior margin narrower. Pregula in 

 357 form of narrow, transverse, reddish brown plate with a straight, or slightly 

 concave, anterior margin (Figure 607, B). 



Intermediate anterior-margin seta situated near lateral seta, brown, 

 moderately long, thick; median seta shorter; lateral seta situated in 

 anterior angle, large, light, curved inward, longer than median seta, thick, 

 opposite setae crossed at end; anterior frontal seta large, procunabent, 

 similar in form to lateral seta, but slightly smaller and thinner; inter- 

 mediate frontal seta short, thin, situated near tentorial pit; posterior frontal 

 seta, as in Le pi do stoma, situated in posterior part behind row of light 

 dots. Seta 7 brown, moderately long, strong, like intermediate anterior- 

 margin seta, but slightly larger; seta 10 brown, situated near eye, 

 immediately behind antenna; seta 9 long, dark reddish brown, situated 

 medially near anterior margin of eye; nearby laterally a small, brushlike 

 secondary seta; seta 11 moderately long, light, situated behind 9; seta 14 

 similar to 9, slightly shorter; seta 12 situated lateral to 14, short, thin, 

 light brown; seta 15 situated some distance behind 12 and 14, thin, long, brown, 

 shorter than 14; seta 13 situated nearby laterally, light, moderately long, 

 procumbent anteriorly; seta 16 situated behind 15, slightly medially, thick, 

 dark reddish brown, moderately long; seta 17 situated lateral to fork, large, 

 long, similar to, and as thick at base as 14; then, thinner; ventral seta 8 

 short, strong, brown; seta 18 small, light. 



Labrum, as in Lepidostoma, relatively small, with broad, hairy, 

 membranous, anterior margin; posterior-angle sclerites wide, short, reddish; 

 seta 1 in form of light, thick spine lateral to depression; seta 2 situated on 

 membrane near process, light, pointed, spine- shaped; seta 3 short, light, 

 situated laterally near margin; seta 4 thick, light brown, blunt, curved to 

 margin; setae 5 and 6 brown, short, thick, pointed. 



Mandibles massive, mainly black, reddish distally; left mandible with a 

 large tooth, and a small, round, tooth- shaped process on dorsal blade, in 



446 



