378 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



notice that some of the eggs in the para type material have a reticulate 

 structure of wax, which mostly disappears when mounted in xylol 

 balsam.) 



Larva, first instar (fig. 2). — Length 0.03 mm., form elhptical; 

 color pale brownish; eyespots purphsh brown, and the vasiform 

 orifice a darker brown than the remainder of larva. On the dorsum 

 the abdominal segments are distinct. There is a pair of minute 

 setae bordering the vasiform orifice, and there are two pairs of very 

 long curved spines situated on tubercles, one pair on the cephaUc 

 extremity, just cephalad of the eyespots, and the other on the middle 

 of the larva. The margin (fig. 3) is very minutely toothed, the teeth 

 being rounded at their tips. There are 15 pairs of marginal hairs 

 observable on the paratype specimens, though these are in such a 

 condition that c'iher hairs may be present and not visible. Of the 

 marginal hairs the caudal pair is long and the third caudal pair 

 extremely so. The others are nearly uniform in length. The vasi- 

 form orifice (fig. 4) is nearly triangular Avith the caudal extremity 

 rounded. The operculum is rectangular and about half fiUs the 

 orifice. The lingula is elongate, extends nearly to the caudal 

 extremity of the orifice, and its tip is setose. 



Pupa case (fig. 5). — Length about 1.28 mm., width 1.12 mm., in 

 broad specimens. There is considerable variation in the relative 

 lengths and widths in different specimens ; some look rather long and 

 narrow, while others are nearly as broad as long. Color of case by 

 transmitted light very dark brown to black. There is a distinct 

 broad marginal rim evenly marked off from the central dorsal disk. 

 This central dorsal area is divided into two parts: First, a central 

 area with very little sculpturing, on which the abdominal segments 

 are distinctly visible; and, secondly, a subdorsal area forming a band 

 all around, but narrowing at each extremity. This is covered with 

 numerous irregular corrugations, and the sutures of the abdominal 

 segments are not visible upon it. The transparent eyespots are more 

 or less crescent shaped and are located within the subdorsal area. 

 There are also upon the dorsum many minute transparent circular 

 pore-Hke places arranged in irregular or broken rings about the case. 

 There seem to be two rows of these on each side of the middle dorsal 

 area and one row on the subdorsal area. The vasiform orifice (fig. 6) 

 is somewhat triangular and longer than broad. The operculum is of 

 a similar shape and fills about two-thirds of the orifice. The inner 

 membrane is reticulate as shown in the figure. The orifice is sur- 

 rounded by an area similar to that present in the other species of 

 the group, consistmg of a cephalic and two lateral lobes wliich form 

 a channel caudad. The marginal rim (fig. 7) is irregidarly divided 

 by a large number of sutures extending mesad on the submarginal 

 area. The outer extremities of these form shallow rounded teeth on 



