(508) 



812 A 



813 



FIGURES 811-813. Oecetis la cu st ri s Pict. : 



811 — pronotum (A), mesonotum (B),propleuron (C); 812 — posterior part of segment 

 9, dorsal (A), larval case(B); 813 - pupa: right mandible, ventral (A), anal rods of 

 female pupa, lateral (B),ventral(C) (813 - after Klapalek). 



Case made of sand grains, smooth, slightly curved, slightly tapering 

 posteriorly; posterior membrane in form of narrow ring with a broad 

 oval hole (Figure 812, B). 



Pupa. Length 6. 5 — 7.2 mm in male pupae; female pupae 8.4 mm. Antennae 

 of male pupae coiled about 5 times around the body. Median process of 

 lab rum shorter and wider than in Oe. ochracea. Mandibles 

 (Figure 813, A) slightly wider distally than in Oe. ochracea. Wing 

 sheaths narrow, reaching abdominal segments 6—7. Fore and mid tibiae 

 without natatorial setae, in contrast to Oe. ochracea; fore and mid -tarsi 

 with dense natatorial setae. 



5725 



636 



