Forelegs more massive than the others; both ventral setae of femur 

 short; tarsus with a dense ventral comb of spinules (Figure 573). Femora 

 of midlegs and hind legs with a relatively long distoventral seta; second 

 seta situated nearby, small and thin; claws of midlegs and hind legs with a 

 thin basal seta and a short spinelike process. 



First 7 abdominal segments uniformly broad; segment 8 slightly 

 narrower, convex dor sally; anterior -angle setae of this segment long and 

 displaced posteriorly (Figure 569). 



Anal legs as in T i n o d e s; distodorsal group of section "b" with 6 long 

 setae and a short subapical seta; claw strongly curved, without ventral 

 spinules (Figure 574). 



Mode of life and habitats. The larvae build tunnels attached to 

 pieces of wood; according to Hickin (1950:71—72), the larvae of Lype 

 reducta do not settle on stones; tunnels 75mm long; anterior end 5.5mm 

 wide and the posterior end 1.0 mm; tubes covered with fine sand grains and 

 detritus. The larvae live in calm parts of rivulets; they are known from 

 the rivulets of the Khosta and the Ptsyr-Tskha at the Black Sea coast. 



Distribution. West of the European USSR, northern Transcaucasia. 

 In addition, Europe. 



3. Genus Psychomyia Latreile 



Full-grown larva. Length 4.5—8 mm. Head yellowish, with light brown or 

 brown pattern or without pattern. Frontoclypeus broad, with shallow lateral 

 indentations, with a narrow blackish brown anterior margin and with 

 2 processes lateral to the shallow median depression of the margin; 

 posterior part of sclerite dark, with light dots; posterior frontal setae 

 situated near the suture. 



Mandibles long; median depression present only distally; place of molar 

 tooth with a small tubercle at the base; a deep basal groove at the outer 

 side; light outer setae near the distal margin of this groove. Submentum 

 pentagonal, very wide, black, blackish brown or reddish brown, with a light 

 median suture and tuberculate surface; ligula thin, not longer or only slightly 

 longer than maxillary palps. 



Pronotum light, with indistinct or distinct brownish or brown pattern; 

 anterior -margin setae light, long, in a row at the margin. Femora 

 with convex dorsal margin and short ventral margin; ventral setae small. 

 Claws of legs with 2 basal setae. Sclerite of section "b" of anal legs with a 

 subapical and 5—7 apical setae; claw with 5 massive pointed spinules 

 ventrally. 



Pupa. Length about 4 mm. Antennae of female pupae reaching end of 

 segment 6. Blade of mandibles slightly convex in the middle, finely serrate, 

 its filiform end very thin at the apex, sinuous. Presegmental plates present 

 on segments 2—8, postsegmental plates on segment 5. Lobes of last segment 

 with several long stiff terminal setae. 



Case 5—6 mm long, covered with sand grains, its walls rather thick. 

 406 Mode of life and habitats. The larvae are detritophagous and 

 build tunnel- shaped tubes, in rivulets and brooks with solid bottom and on 

 the open littoral of lakes. 



455 



