Pupa. Length of male pupae 13—14 mm, of female pupae 16—17 mm. 

 Antennae of female pupae reaching end of abdominal segment 6, those of male 

 pupae almost reaching end of body. Anteclypeus short and broad; sides 

 with 3 setae situated close together near the posterior margin, and 3 setae 

 near the lateral margin; median and lateral setae of this row longer and 

 thicker than the others. Labrum with rounded anterior margin and 

 numerous setae, 4 of them thicker and longer; an indistinct dark spot 

 posteriorly in the middle. 



Mandibles with broad, massive basal part and a long apical part with 

 slightly concave, serrated inner blade; 4 small denticles among the 

 serrations. 



Wing sheaths of female pupae reaching beginning of segment 4, those of 

 male pupae beginning of segment 5. Natatorial setae light, present on 

 segments 1—4 of mid-tarsi. Presegmental plates present on segments 3—8, 

 postsegmental plates with anteriorly-directed spinules on segments 3—5; 

 number of spinules given in Table 13; they are more numerous in female 

 pupae than in male pupae. 



Postsegmental plates on segment 4 very small, those on segment 5 dark 

 brown and large as on segment 3; spinules of postsegmental plates small, 

 477 forming several rows; presegmental plates light brown; large dark spines 



forming a row near the posterior margin; several smaller and thinner spines 

 near them on some plates. 



Gills present on abdominal segments 2—7, forming a pleural and a ventral 

 row; stalks of pleural gills thick, forming flattened lobes which are narrower 

 apically; stalks of abdominal gills straight and thin. Both pleural gills 

 situated postsegmentally, close together, one behind the other; anterior gill 

 situated slightly more ventrally; ventrolateral gills form a row; 2 gills on 

 a common base; median row absent; segments 2, 3, sometimes also 4, with 

 an additional small gill lateral to the double gill (Table 14). 



Anal rods broad and short, dark brown at the end and curved upward, 

 divided into 2 flattened lobes; median lobe larger than lateral lobe; 

 numerous thin, blackish brown setae laterally and ventrally; ventral side 

 with 3 longer, thick, light, curved setae near the base of the lobes; female 

 pupae with 2 additional but thinner setae. 



Mode of life and habitats. Small cool brooks and rivulets; 

 Sitsa and Ugodinza rivulets of Maritime Territory. 



Distribution. Maritime Territory of the USSR. In addition, North 

 China. 



X. Family HYDROPSYCHIDAE Curtis 



Full-grown larva. Length 14—22 mm. Head usually more or less 

 flattened dor sally, convex ventrally. Antennae as in Arctopsychidae, situated 

 near the margin of the head, in form of small membranous tubercles, with 

 3 sensillae and 2 thin light setae; eyes small, situated near the anterior 

 margin. Frontoclypeus with curved sides, without curvature near the 

 tentorial pits, which are situated inside the frontal sutures. Gula small, 

 triangular, fused with pregula, sometimes situated outside the head capsule. 



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