﻿232 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loo 



to VI. Hair A very small, unpigmented, inserted on lateral border, 

 or slightly dorsad, on segments II to VI ; on segments VII and VIII a 

 large fan-shaped tuft with barbed branches, inserted well away from 

 posterolateral angle on ventral surface of VIII, near posterolateral 

 angle on dorsal surface on segment VII; that of VIII longer than 

 paddles. Hair 2 of segment II inconspicuous, shorter or almost equal 

 to B, usually simple. Puddles light, yellowish brown, rather short; 

 inconspicuous fringe of short, submarginal hairs on apex, continued 

 basally, especially on inner margin; no apical hair, midrib rather 

 poorly developed, evanescent at tip; roughly triangular, with apex 

 only slightly produced, rounded ; inner margin about one-third width 

 of outer. 



Male genitalia: Genital lobes extending to about five-sixths of 

 paddles, slightly longer than wide, sides curved, apex rounded. Anal 

 lobe (segment IX) about half as long as genital lobes and three-fifths 

 as wide, roughly triangular but rounded on apex. 



Female genitalia: Genital lobes a little less than half as long as 

 the paddles, broadly rounded. Anal lobe about one-sixth shorter than 

 genital lobes, same width at base, roughly triangular but rounded at 

 apex. 



Larva (fig. 35, d-f). — Head (fig. 35, d) : Slightly longer than wide, 

 uniformly pigmented a light brown. Antenna cylindrical, very short, 

 smooth ; shaft hair short, simple, placed at two-thirds from base or 

 beyond. Dorsal head hairs very slender and practically invisible: 

 hair A usualy simple; B very long and stronger, simple; C usually 

 double or triple ; d long and simple ; e simple ; f usually double ; ocular 

 simple. Ventral head hairs fairly well developed : postmaxillary very 

 conspicuous, black, about as long as the antenna ; infraorbital usually 

 3-branched; submental placed far forward. Clypeal spines very 

 slender and lightly pigmented. Maxilla elongate, with several greatly 

 developed articulated spines ; the largest spine about a quarter longer 

 than the next largest ; other spines gradually shortened ; all the spines 

 lightly pigmented and rather slender ; largest spine at least as long as 

 the body of the maxilla. Labral tuft well developed, at least three 

 times as wide as one of the clypeal spines. 



Thorax : Prothorax with a pair of stellate tufts dorsally and another 

 pair laterally, three or four branches in each tuft. Metathorax with 

 a pair of stellate hairs dorsally in line with inner prothoraclc tufts, 

 usually two to four branches in each tuft, occasionally reduced to a 

 single spike. Stellate tufts absent on mesothorax. No large spines 

 or thickened hairs laterally. Metathorax with a large dorsolateral 

 7- to 12-branched tuft ; branches very long, slender, barbed. 



Abdomen (fig. 35, e, /) : Stellate tufts long, black, conspicuous, with 

 three or four barbed branches. On first segment two stellate tufts on 

 each side dorsally, arising from a common basal tubercule ; on follow- 



