PROC. ENT. SOC. WASH., VOL. 21, NO. 4, APR., 1919 65 



a central ring surrounded by a single circle of similar rings, the number in 

 the circle varying from 6 to 8, with 7 the most frequent, and these in turn 

 surrounded by a continuous thickened chitinous circle, in profile the small 

 circles appearing as a bundle of tiny cylinders protruding from the thickened 

 circular enclosing band; body ventrally with smaller hairs and fewer gland 

 pores scattered over the anterior half, on the posterior half with a narrow 

 but conspicuous, irregularly circular or oval continuous band of closely set 

 multiocular gland pores and nearly blunt-tipped setae which evidently 

 are responsible respectively for the secretion and support of the ovisac, 

 this band located on the ventral surface of the abdomen, extending across 

 it just behind the posterior legs and curving back and running around the 

 posterior portion of the abdomen parallel and close to the body margin, 

 the setae of this band with bases distinctly different in type from those of 

 the other hairs found on the body; with five small irregularly-shaped clear 

 cicatrices included within that portion of the band crossing the abdomen 

 just behind the posterior legs, of which the middle is the smallest and the in- 

 termediate pair the largest; with three ventral cicatrices, circular or somewhat 

 irregular in outline, the median much the largest, placed inside the ventral 

 gland band near the posterior end of the body; the relatively large, oval 

 anal opening placed a little back of the middle of the dorsum of the abdomen ; 

 with a series of indeterminate chitinized structures, in reality small invagina- 

 tions of the body wall presumably for muscle attachment, curving forward 

 and outward from the anal opening on each side, these apparently 7 or 8 

 in number in each series, and with one or two rows of similar but smaller 

 structures on each side of this larger row, and still another row, of small size, 

 ventrally, curving outward and forward from the end of the ventral cica- 

 trices on each side; while not definitely determinable from the material at 

 hand, apparently with from three to five rows of these tiny invaginations 

 dorsally on each side of the middle line; antennae 9-segmented, the relative 

 shape and size of the segments shown in the figure, the lengths of the segments 

 in microns as follows: 1 



legs not unusual for the genus, lengths of the parts of ;i middle leg. iVinur 

 310/i. tibia 335 ju, tarsus 207 /u. claw liii/u, claw slender, slightly curved, digitulc.s 



1 In this and succeeding tabulations of antennal measurements, the 

 length of the first segment is always omitted as it is so often twisted or dis- 

 torted that it is rarely possible to obtain an accurate measurement. 



