﻿242 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lOo 



4; basal arm expanded at base, slender beyond the middle. Ninth 

 tergite (fig. 33, /) with a deep median emargination, narrower than 

 one of the lobes ; lobes variable in length, usually twice as long as wide ; 

 three to six very long bristles or spines deeply inserted and evenly 

 spaced on the posterior margin of each lobe, beginning internally at 

 about the middle of the lobe and ending on outer apical angle. 



Female. — Very similar to the male, except for sexual characters. 

 Terminal antennal segments not elongate. Proboscis 1.1 of front 

 femur, about 0.90 of abdomen. Palpi about 0.15 of proboscis, terminal 

 segment without conspicuous bristles. 



Pupa (fig. 37, c). — Cephalothorax : Dorsal surface and basal por- 

 tions of wing cases darkly pigmented, remainder light. Trumpet 

 darkly pigmented throughout, uniformly reticulate ; index of length 

 to median width about 2.5 to 1 ; width more or less uniform beyond 

 base; inner wall well separated from outer in basal third or more; 

 opening small, oblique. Hair 1 very long, double from base ; 2 and 3 

 well developed, conspicuous, usually 2-branched ; 4 and 5 about equal 

 in size, 4 triple, 5 double ; 6 shorter, simple ; 7 longer than 4, simple ; 

 8 and 9 longer than trumpet, 8 double or triple, 9 usually simple ; 10 

 minute; 11 and 12 long, simple, 12 longer. 



Abdomen: Darkly pigmented; anterior segments darker; pos- 

 teriorly segments laterally lighter ; unpigmented areas at the base of 

 the larger hairs. First segment : float hair well developed, flattened, 

 branches arising in one plane ; hairs S, T, U not separated as a group, 

 placed near the others ; H and L small, H simple, L usually double ; U 

 minute; K and S long, simple; M and T shorter, simple or double. 

 Hair B (8) very long and simple on segments IV, V, and VI, usually 

 extending beyond apex of following segment, inserted well away from 

 margin; on segments II and III shorter, simple; on VII usually 

 double, short. Hair C (10) not conspicuous, usually branched, larger 

 on anterior segments. Hair C rather well developed, on anterior 

 segments particularly; simple, inserted mesad of C on all segments, 

 but most noticeably on segments IV to VI, removed about a fourth to 

 third from apex of segments. Hair A small but conspicuous, spine- 

 like, unbranched on segments II to VI ; on segments VII and VIII a 

 large fan-shaped tuft with barbed branches, that of VIII extending 

 beyond apex of paddles; A' on segment VIII extending to beyond 

 third of paddles. Hair 2 of segment II very long, usually twice as 

 long as B, inserted at about middle of segment ; most conspicuous hair 

 of this segment. 



Paddles short, without marginal fringe or apical hair; midrib 

 poorly sclerotized, evanescent beyond middle; roughly triangular; 

 apex (at end of midrib) rounded; inner half more than a third as 

 wide as outer. 



