^366) 



366 



situated on a light area; sensilla of antennae long, with a seta near the apex. 

 Labrum longer than broad; hairs near the anterior margin long laterally 

 and short in the middle. Mandibles asymmetrical; left mandible longer 



than right, with 2 blunt distal teeth, and 

 with a deep groovelike median notch; 

 blades serrated; upper blade with a 

 large blunt, broad tooth; right mandible 

 slightly concave on the inner side, with 

 a large distal tooth and 2 teeth lateral 

 to it; outer basal setae of mandible of 

 different length. Submentum very broad. 



Sclerites of thorax blackish brown, 

 narrower posteriorly, with dark setae. 

 Legs relatively short and strong, blackish 

 brown; claws almost as long as tarsi, 

 with a straight basal spine. 



Abdominal segment 1 almost as broad 

 as metathorax; segments 4 and 5 broader 

 and higher than the others. Abdominal 

 tergites blackish brown or blackish; 

 sclerite of abdominal segment 1 curved, 

 lighter posteriorly than anteriorly; 

 sclerites of segments 2—7 broader in the 

 middle than laterally, rounded posteriorly; 

 sclerite of segment 8 larger than on the 

 preceding segments; surface setae 

 situated near the posterior margin of the 

 sclerites; small conical tubercles with a 

 sclerotized dot and 2 lateral setae at the 

 apex on the sides of the segments. 

 Intersegmental constrictions with small 

 dark rodlike sclerites. Sclerite of 

 segment 9 covering the dorsum com- 

 pletely. Claws of anal legs short and 

 strong. 



Case barrel-shaped, grayish yellow, 

 slightly dorsoventrally compressed, 

 made of secretion and with fine sand 

 grains; anterior and posterior openings 

 oblique; length of case 3 mm, width 

 0.7— 0.8 mm. 



Pupa. Length 1.7— 2.1mm. Head 

 broad, antennae short, reaching anterior segments of abdomen. Labrum 

 with a blunt median process at the anterior margin; lateral setae at 

 posterior margin long. Mandibles slightly curved, gradually tapering from 

 the broad base to the narrow apex, with smooth, nonserrated blades; basal 

 outer setae short, situated behind each other. Wing sheaths reaching end of 

 body or slightly beyond it. First tarsal segment very long. Presegmental 

 plates light, situated on segments 3—7; postsegmental plates darker, situated 

 on segments 3—5. 



FIGURES 492 and 493. Stactobia fusci- 

 cornis Schneider (after Siltala): 



492 - 3rd- stage larva, dorsal; 493 — abdomen 

 of 4th-stage larva, lateral. 



407 



