362 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



The entire dorsum has a fine irregular mottled appearance due possibly 

 to differences in chitinization. There is a small dorsal median ridge 

 and the abdominal sutures are distinct. Just laterad of the median 

 ridge on each side of the caudal edge of each suture there is a small 

 area of a hghter brown than that surrounding it. There is also on 

 the submarginal area a series of minute transparent pores, the loca- 

 tion of which may be seen in the figure. On the median portion of 

 the case several of these pores are present. The margin (fig, 9) is 

 plainly marked off into a series of toothhke sections by sutures 

 extending mesad. These sutures extend farther than those of the 

 second instar, and the divisions are more prominent. Vasiform 

 orifice (fig. 10) triangular; operculum of a similar shape and almost 

 entirely filhng the orifice, leaving only the setose tip of the lingula 

 exposed. The differentiated area surrounding the orifice and form- 

 ing the caudal channel, so distinct in the pupa case, is visible also in 

 this instar, though is not so marked. There is a pair of caudal setae 

 and a smaller pair of latero-caudal ones. 



Pupa case (fig. 11). — Size averaging about 1.35 by 1.1 nmi.; 

 outline eUiptical; color by transmitted fight almost black on the 

 dorsum, which is surrounded by a fine yellowish brown line separating 

 this from the brown marginal rim. Eye spots crescent shaped, trans- 

 parent; structure surrounding the vasiform orifice and extending to 

 the caudal margin almost black, while the channel it forms is light 

 brown. On the dorsum the sutures are distinct and there are scat- 

 tered over the case a number of very minute transparent pores, the 

 relative positions of which are indicated in the figure. Marginal rim 

 broad and separated from the dorsum by a distinct fight line. Mar- 

 ginal rim (fig. 13) marked by a large number of light transparent 

 sutures extending mesad from the margin. The sections marked off 

 by these sutures form by their outer extremities the rounded teeth 

 of the margin. There are on this marginal rim a few scattered very 

 minute transparent pores similar to those on the dorsal area. The 

 vasiform orifice (fig. 12) is triangular, somewhat acute caudad, and 

 the operculum is very much the same shape, nearly fiUing it. The 

 lower caudal membrane of the orifice is sculptured or folded irregu- 

 larly. Near the latero-cephalic margin of the orifice a pair of setae 

 is situated, and surrounding the orifice and extending caudad to the 

 margin of the case there is a distinct area, the outfine of which is 

 indicated in the figure. This is dark brown, leaving a median, yel- 

 lowish brown caudal channel. On the cephafic portion of this struc- 

 ture there are three pairs of minute transparent porefike places. 

 The waxen secretion is fully described in tlie original characterization. 



Adult female. — Color yellowish shaded with brownish black. 

 Length about 0.83 mm. Antennae absent in all but one specimen, 

 and on this only distorted portions of one antenna remain. Fore- 



