16 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



with a long dimension of about 10/x, but both sorts varying some- 

 what in size, the larger continued on to the ventral face of the body 

 opposite the spiracles, and arranged in a fairly definite pattern 

 dorsally, although one rather difficult to describe but usually with an 

 interrupted and incomplete row of large pores, each placed trans- 

 versely, along the median line in the mid-dorsal area, and on each 

 side of this large whorls or circular bands composed of large and 

 small pores intermingled, each with its long axis at a right angle 

 to the radius of an imaginary circle, outside of these circles, near 

 and at body margin, with numbers of large and small 8-shaped 

 pores irregularly disposed; ventral abdominal surface in genital 

 region without circular loculate disk pores, but with small 8-shaped 

 pores in transverse bands; tubular ducts rather numerous and 

 widely distributed, but small and much less conspicuous than the 

 8-shaped pores: with a small cluster of tiny multilocular disk 

 pores near each antenna and additional similar pores scattered 

 over the ventral surface, and with a single row of quinquelocular 

 disk pores running from each anterior spiracle to margin, and a 

 cleft row, with the ends widely separated, from each posterior 

 spiracle, the pores at inner end of each row definitely smaller than 

 those at outer end; cribriform plates small, very roughly circular, 

 set in small chitinized plates, often double, arranged in two paired 

 groups, the anterior group on each side usually limited to two plates, 

 the posterior comprising from two to four such plates, with three the 

 number most frequently present; minute simple pores not certainly 

 observed; anal lobes well developed, stout conical, each bearing an 

 apical seta about 180/a long, two stout, curved, spinelike setae on 

 inner face, the larger about 32ju,, and three much smaller, short 

 slender setae on outer face, outer margin of each lobe thickened 

 below, inner face thickened and lightly but fairly distinctly irregu- 

 larly areolate; anal ring with pores and eight setae, each about 80/x 

 long; Cauda short tapering, broadly rounded at tip and bearing one 

 to several tiny teeth along margin of outer half. 



Intermediate fetnale. — Not available. 



Larva. — Body, as mounted, elongated ovoid, broader before the 

 middle, length about 360/*, width about 180/i,; antennae 6-segmented, 

 total length around 107/x, slightly enlarged apically, third segment 

 longest; legs not unusual, claw with denticle, both claw and tarsal 

 digitules Imobbed and exceeding claw tip: beak short conical, in- 

 completely 2-segmented; spiracles not unusual, each with a single 

 quinquelocular disk pore at opening and the anterior with one, the 

 posterior with two well-separated quinquelocular pores at margin 

 opposite the spiracle ; marginal setae small and inconspicuous, alter- 

 nating with the marginal 8-shaped pores, no spiracular spines ; dor- 



