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relatively long, situated dorsally near end of suture; seta 6 short, situated 

 on distal side of suture; seta 3 situated distally, as is seta 2, light, 

 moderately long; seta 7 and 8 short, light; seta 5 situated laterally near 8; 

 seta 4 situated inward from 8, small. 



Anterior part of case flattened ventrally and made of small sand grains; 

 dorsal side of anterior part with larger, coarser grains; sides with still 

 larger grains; difference between dorsal and ventral walls less marked 

 in posterior part. 



Mode of life and habitats. Small, running water bodies, streams, 

 brooks and mountain rivulets, on stones; phytophagous. 



Distribution. USSR: Caucasus from Ordzhonikidze [North Ossetia] 

 to Georgia. 



3. Apatania crymophila McLachlan 



Levanidova, 1962:192-193, Figures 2, 3. 



Full-grown larva. Length 7— 9 mm. Head (Figure 197, A) mainly 

 chestnut brown dorsally, whitish gray posteriorly; frontoclypeus darker 

 laterally than in the middle, with light brown posterior angle and a group of 

 large, light dots at site of wedge-shaped pattern. Several similarly large, 

 but less distinct dots laterally along posterior branch of frontal sutures 

 and lateral to coronal suture; ventral surface mainly light; median area 

 near gular suture brownish, dark brown posteriorly. Frontoclypeus with a 

 regular network of small, needle-shaped spinules on small tubercles or 

 on the surface; lateral surface with smaller spinules on ridges behind eye, 

 1 or 2 spinules in each row larger than the others; ventral surface 

 reticulate; marginal ridges with small denticles or fine spinules; spinules 

 singly or in pairs on smooth surface near gular suture. Gula (Figure 

 197, B) brown, long, with round posterior angle and sparsely spinulose 

 surface. 



Median and intermediate anterior margin setae dark brown, moderately 

 long, the former slightly shorter; lateral anterior -margin seta light, curved 

 inward, filiform apically; anterior frontal seta, exceptionally large, longer, 

 and slightly thicker than anterior -margin setae, and resembling the 

 intermediate seta; middle and posterior frontal setae light, small. Anterior 

 part of frontoclypeus, including anterior angle, with 17—19 light and 

 brownish setae, short and small, of different thickness; posterior side 

 laterally with 6—10 small setae. Seta 7 situated anterior to antenna, 

 moderately long; seta 10 shorter, both brown; seta 9 long, thick, reddish 

 brown; seta 14 also dark but longer, about as long as width of head; 

 seta 11 thin, at level of middle of eye, moderately long; seta 12 slightly 

 larger, light; seta 13 small, light; seta 15 thin, long, slightly shorter than 14; 

 seta 16 situated behind 15, small, light; seta 17 brown, short, situated 

 anterior to fork of frontal sutures; ventral seta 8 relatively large, dark 

 brown, thin; seta 18 small, light. About 20— 22 secondary setae from 

 antenna to level of seta 17 lateral to frontal sutures small and light. 



Pronotum (Figure 198, a) yellowish, with distinct anterior angle; anterior 

 margin brownish, merging gradually with darker brown lateral margin; 



148 



