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4. Genus Apsilochorema Ulmer 



The larva of only one species is known in the USSR. 



Mode of life and habitats. Brooks and rivulets with cool water. 

 Distribution. USSR: Middle Asia, southern part of the Maritime 

 Territory; rare. In addition, southern Asia, New Guinea. 



1. Apsilochorema sutshanum Martynov 

 Levanidova, 1961:211-215, Figures 1-4. 



Full-grown larva (Figure 335). * Length 

 8—9 mm; abdomen much broader than head and 

 thorax. Head yellow, without pattern; eyes small, 

 situated near anterior margin of head (Figure 336). 

 Frontoclypeus (as in Psilochorema) 

 (McFarlane, 1951:283-286, Figures 72-95) 

 irregularly triangular, narrower posteriorly; 

 frontal sutures uniformly curved in the anterior 

 part; tentorial pits little marked; gula small, 

 triangular, fused with the pregula, which is larger 

 (Figure 337). Anterior -margin setae small; 

 lateral seta situated in the angles of the sclerite; 

 transparent, light, curved inward; intermediate 

 seta straight, situated near the lateral seta; 

 median seta situated at a distance and directed 

 inward; anterior and middle frontal setae small, 

 situated nearby in the anterior part of the 

 sclerite; posterior frontal setae long and dark. 

 Seta 9 situated near the anterior margin of the 

 head, relatively long and dark; the thin, small 

 seta 11 displaced from seta 9 and situated more 

 ventrally; seta 7 shorter than seta 9, similarly 

 strong and dark; seta 10 small, directed 

 posteriorly; the short, yellow seta 14 is situated 

 posterior to the eye; the short, light seta 15 is 

 situated at the level of the tentorial pit near the 

 frontal suture. The long, strong and dark seta 16 

 is situated further laterally; the short, ventral 

 seta 8 is situated at the anterior margin of the 

 head. The other setae were lost. 



Labrum short and broad. 



Mandibles (Figure 338) flattened, with only 

 distal teeth; upper blade of left mandible with 

 3 small teeth and a large pointed middle tooth on 

 the outside; lower blade marked only in the 

 anterior part and with 2 small distal teeth; upper 

 blade of right mandible with 4 small teeth in 

 addition to the apical tooth; short lower blade of 



FIGURE 335. Apsilochorema 

 sutshanum Mart. Full-grown 

 larva in pupal cocoon, ventral 



This description is based on one specimen taken from a pupal cocoon, and on several sclerites from the 

 pupal case of another specimen. 



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