﻿SOLOMON ISLANDS TRIPTEROIDES — BELKIN 223 



apex of following segments on IV and V, somewhat shorter on VI, all 

 inserted near apical margin; on segments II and III, much weaker, 

 very slender, lightly pigmented, not reaching the apex of following 

 segments ; poorly developed on VII. Hair C ( 10) small, inconspicuous, 

 lightly pigmented or not at all, branched on basal segments, usually 

 simple or with a few branches at tip on posterior segments. Hair C 

 usually simple, very short, inconspicuous, inserted about a sixth from 

 apex of segments; placed mesad of C, especially noticeably on seg- 

 ments IV to VI. Hair A very small, unpigmented on segments II to 

 VI, inserted on lateral border ; on segments VII and VIII a large fan- 

 shaped tuft with barbed branches, inserted well away from posterolat- 

 eral angle on ventral surface on segment VIII, near posterolateral 

 angle on dorsal surface on segment VII ; that of VIII shorter than pad- 

 dles. Hair 2 of segment II inconspicuous, shorter than B, usually with 

 three or more branches. Paddles clear yellow, rather short, a few 

 minute hairs near apex, particularly on inner border, no apical hairs, 

 midrib poorly developed, evanescent at tip ; roughly triangular with 

 apex produced into short truncate lobe at end of midrib ; inner half very 

 narrow, about third of width of outer half. 



Male genitalia : Genital lobes extending to about nine-fourteenths 

 of paddles, about as long as wide, curved laterally, apex rounded. 

 Anal lobe (segment IX) a little more than half as long as genital 

 lobes, broadly rounded and much narrower than genital lobes. 



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

 paddles; broadly rounded. Anal lobe a little less than five-sixths of 

 genital lobe, three-fourths as wide, broadly rounded. 



Larva (fig. 35, a-c). — Head (fig. 35, a) : Slightly longer than wide, 

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

 smooth; shaft hair short, simple, placed at apical third or beyond. 

 Dorsal head hairs very slender and practically invisible : hair A usu- 

 ally double, B simple, C usually double or triple, d long and simple, e 

 simple, f usually double, ocular simple. Ventral head hairs poorly 

 developed : postmaxillary usually lightly pigmented, about half as 

 long as the antenna or shorter ; infraorbital usually simple ; submental 

 placed far forward. Clypeal spines very slender and lightly pig- 

 mented. Maxilla elongate, with two greatly developed, articulated, 

 apical spines ; the largest spine about as long as the body of the maxilla 

 and projecting beyond anterior margin of the head ; at the base of the 

 smaller spine a number of smaller teeth ; a recurved tooth at the base 

 of the larger spine. Labral tuft very slender. 



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

 pair laterally, three or four branches in each tuft. Stellate hairs 

 absent from other segments. No spines or thickened hairs. Meta- 

 thorax with a large dorsolateral, 12- to 18-branched tuft, branches very 

 long and slender, plumose. 



