1. Amphipsyche proluta McLachlan 



Lepneva, 1947:148-150, Figures 17-25; 1960a:l 78-181, Figures 4-5. 



Full-grown larva. Length 10—11 mm. Color light, head slightly darker. 

 Head and thorax much narrower than abdomen; maximum width of abdomen 

 2.0—2.1 mm on segments 4—6; width of mesothorax 1.1 mm, width of head 

 1.0 mm, length of head 1.1 mm. 



Flattened area of dorsal surface of head surrounded by a ridge, brownish 

 (Figures 745 and 746) with a broad, transverse, light stripe in anterior part; 

 other part of head yellowish. Frontoclypeus oblong-triangular, its posterior 

 angle reaching the ridge; frontal sutures slightly curved in region of ten- 

 torial pits. Anterior margin of sclerite reddish brown; a narrow, yellowish 

 stripe and a broad dark stripe posterior to it; posterior angle of fronto- 

 clypeus light, with large, indistinct, subapical dots; similar dots form 2 light 

 groups in posterior part, lateral to frontal sutures. Surface of sclerite 

 inside the ridge with small covering chetae which appear like light dots in 

 preparations; covering chetae of frontoclypeus teat-shaped (Figure 747); 

 teat- shaped, and hairlike chetae and chetae of transitional type with a broad 

 base and long, thin end lateral to frontal sutures; also a few small branched 

 setae with a short shaft; a star-shaped seta on each side, at anterior margin. 

 Primary anterior -margin setae situated in angles of sclerite (Figure 745), 

 situated close together, straight and thin; lateral of these setae yellowish 

 and long; intermediate and median setae short; the same group also contains 

 several light, long, secondary setae. Anterior, frontal seta small, thick; 

 mediofrontal seta situated near tentorial pits, little marked; posterior, 

 frontal seta similar. Seta 9 dark brown, strong, longest seta of the head; 

 thin, long seta 11 near it; several small secondary setae near clypangulus; 

 seta 7 brownish, relatively long; small seta 10 situated lateral to the ridge, 

 near the eye; setae 12, 13 and 14 situated behind each other posterior to 

 eye; light short seta 15 and light longer seta 16 situated in posterior part, 

 inside the ridge; 2 small, light, secondary setae anteriorly near eye; 

 seta 17 short, slightly thickened, situated near suture. 



Covering chetae absent on sides and ventrally; longitudinal rows of large 

 transverse dashes laterally on ventral side (Figure 750); groups of large, 

 slightly dark dots posterior to dashes, near occipital foramen; a narrow, dark 

 stripe along suture; gular suture turning to the left anteriorly; gula not 

 differentiated; postgula consisting of a small, shining, brown sclerite; seta 8 

 situated near anterior margin, thin and small; seta 18 with 2 branches small 

 and situated in anterior third. 



Anteclypeus with large, light brown, transverse sclerites with dark 

 elliptical spots in middle; each sclerite divided by a suture into a large 

 median part and a small lateral part. 



Anterior margin and part of lateral margin of labrum (Figure 748) 

 broadly membranous. Dorsal sclerite light brown, with small covering 

 setae. Two tufts of thin, long, light hairs on each anterior angle on 

 evaginated membranous lobes; anterior margin with a row of similar light 

 but shorter hairs laterally. One of the primary setae (probably seta 5) 

 situated at anterior margin, brown, longer and stronger than other primary 

 and secondary setae on surface; dark median pit situated in posterior part. 



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