labrum yellowish white, distinct on the membranous, transparent, white 

 surface of the labrum. Upper blade of left mandible with 2 blunt teeth 

 situated close together; lower blade with 2 pointed teeth near the terminal 

 tooth; a serrated part, with a small basal tooth at the end posterior to 

 these teeth; upper blade of right mandible with one tooth; lower blade with 

 3 distal teeth (2 very small) and a serrate part; basal tooth absent. 

 Sclerites of maxillolabium yellowish; stipes darker. Setae of head and 

 mouthparts as in Wormaldia occipitalis. 



(373; 



FIGURES 507-510. Wormaldia sub ni g ra McL. (after Hickin): 



507 - full-grown larva, lateral; 508 - head, dorsal; 509 - pronotum; 

 510 - end of tarsus and claw of forelegs (A) and midleg (B). 



Pronotum (Figure 509) narrower posteriorly; posterior margin dark 

 brown, crenulate posteriorly; the white sclerotized area posterior to the 

 margin is as wide as the margin in the middle; setae as in W. o c c i p i - 

 talis. The brown stripe is narrow laterally and not as distinct as in 

 W. occipitalis; it bears a black, oblong spot near the articulation with 

 373 the pleuron, posterior to which is a small lateral process which covers 

 the propleuron posteriorly; posterior quarter of the lateral margin light. 



Legs yellowish white, without dots; hind legs thinner and shorter than 

 the others; forelegs only slightly darker (Figure 510). Claws of legs not 

 darker than the other sclerites. 



Basal seta of coxa of all legs displaced from the margin of the sclerite; 

 this seta is long on forelegs and midlegs (longer than the coxa); it is short 

 on the hind legs (less than half as long as the coxa); anterodorsal seta 

 of forelegs forming a long, thick, blunt, light yellow spine. 



Sclerite "b" of anal legs with brown spots in the middle and distally; 

 claw brown at base and apex. 



Pupa. Length of male pupae 5—6 mm, length of female pupae 6.5—7.0 mm. 

 Antennae of male pupae reaching end of abdominal segment 7, of female 

 pupae segment 5 or less. All three setae at anterior margin of labrum 

 transparent, small and thin; median setae slightly longer than the others. 

 Mandibles as in Wormaldia occipitalis. 



416 



