Key to Species 

 Full-grown larva 



1 (2). Length at end of 5th stage about 13 mm; lateral margin of pronotum 



with a brown stripe near the pleural articulation, and without black 

 spot 1. W. occipitalis Pict. (p. 411) 



2 (l). Length at end of 5th stage about 10 mm; lateral margin of pronotum 



with a large black spot near the pleural articulation 



2. W. subnigra McL. (p. 41 5) 



Pupa 



1 (2). Length of male pupae 5.7— 6.5 mm, length of female pupae 6.7— 7.7 mm; 



all 3 setae of labrum small and light, thick; lower appendages of male 

 genitalia shorter than penis 1. W. occipitalis Pict. (p. 411) 



2 (l). Length of male pupae 5—6 mm, of female pupae 6.5—7.0 mm; 



2 anterior setae of labrum small, thin and light; seta posterior to 

 them much longer and dark; lower appendages of male genitalia 

 longer than penis 2. W. subnigra McL. (p. 41 5) 



369 1. Wormaldia occipitalis Pictet 



Nielsen, 1942:374-395, Figures 2, 36-49. - Brindle, 1960a:144-147. 



Full-grown larva. Length at beginning of 5th stage 7.6 mm, at the end of 

 the stage 13.3 mm; width of head 0.82— 0.92 mm. Sclerotized parts reddish 

 yellow or brownish pink. 



Head (Figure 494) narrow, oblong, relatively small, dorsoventrally 

 compressed; ratio of width to length 0.60, of width to height 1.4; head 

 slightly narrower anteriorly. Eyes small, double; anterior eye larger 

 than posterior eye. One of the two sensillae of the antennae longer and 

 thinner than the other. Anterior -margin setae of frontoclypeus straight 

 and thin; median setae small; anterior frontal seta curved inward; median 

 seta situated in the anterior third of the sclerite; posterior seta situated 

 near the base of the frontal sutures. Setae 7 and 9 situated posterior to the 

 setae near the base of the mandibles; setae 11 and 10 setuliform; seta 8 

 directed ventrally; setae 12 and 14 situated posterior to the eye and 

 close together; these setae, and seta 9 are longer than the others. Setae 15, 

 16 and 17 setuliform; setae 13 and 18 spinelike. 



Labrum (Figure 495) 3.6 times wider at the anterior margin than long; 

 dorsal sclerite of labrum pale, thin and trapezoidal, with a median process 

 which reaches the anterior margin; posterior-angle sclerites short and 

 curved inward; setae 1 small and thin, curved inward, situated in the median 



370 indentation, on each side of the anterior margin of the process of the dorsal 

 sclerite; the large setae 4 situated posterior to them; setae 2 situated near the 

 angles of the trapezoidal part of the sclerite; setae 6 situated posterior to the 

 pit, thicker than the others; setae 3 situated on the membranous part of the 

 labrum; all the above setae short; setae 2 and 6 longer than the others; 

 setae 5 absent. Mandibles (Figure 496) brown; left mandible with two blunt 



411 



