6 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



derm membranous; antennae reduced to small slightly protruding 

 knobs, bearing three to five fairly evident setae at apex; legs want- 

 ing; spiracles with a slightly curved bar and a few, usually from 

 four to eight, small quinquelocular disk pores between opening and 

 margin; beak very short conical, 1-segmented; with an occasional 

 tiny submarginal ventral seta, and a few small setae ventrally at 

 the posterior end of the body in the genital region; no spiracular 

 spines; 8-shaped pores of normal size in a single marginal row ex- 

 tending completely and continuously around the body excepting only 

 for a small space adjacent to the anal lobes; with a fairly distinct 

 ventral submarginal row of minute 8-shaped pores paralleling the 

 marginal row, although distinctly separated, and with a few similar, 

 but even smaller, pores scattered dorsally; tubular ducts evident, 

 rather uniformly distributed, not very numerous nor crowded ; with a 

 row of quinquelocular disk pores, slightly more numerous than the 

 8-shaped pores, placed immediately below and accompanying the 

 marginal row of 8-shaped pores for practically its whole length ; with 

 five definite midventral abdominal segmental rows of multilocular 

 disk pores, each pore with around 10 loculi, and with a few pores on 

 each side near the margin on the two or three segments anterior to 

 diese ; tiny simple pores present dorsally, but very rare, one occurring 

 at wide intervals in the submarginal region and a few over the dorsal 

 area; anal lobes slightly protruding, each bearing a rather stout 

 apical seta about 70/a long, and one or two much smaller setae below 

 and one within, these about 7/x long; anal ring only very slightly 

 invaginated, the inner faces of the lobes and a somewhat protruding 

 collar above and below the ring chitinized ; ventral face of each lobe 

 with a definite elongate chitinized thickening of somewhat variable 

 dimensions ; anal ring well developed, with pores and six setae, each 

 about 25 IX long. 



Preadult female. — Closely resembling the adult in most particu- 

 lars ; shape about the same ; with far fewer quinquelocular disk pores 

 accompanying the marginal 8-shaped pores; no multilocular disk 

 pores ; presence of minute simple pores and of minute dorsal 8-shaped 

 pores not certain ; ventral submarginal row of minute 8-shaped pores 

 developed, but the pores much less numerous than in adult; anal 

 region practically identical. 



Larva. — Elongate elliptical to slightly ovoid, narrowed behind, 

 length as mounted 340/^, width 185/;,; antennae 6-segmented; legs 

 not unusual; spiracles not unusual, with one large quinquelocular 

 disk pore at margin opposite each and a smaller one halfway be- 

 tween; with four to six fairly evident setae along anterior margin 

 and a ventral submarginal row of minute setae on the abdomen, at 

 least; 8-shaped pores in marginal and submedian rows on each half 



