"20 PROCEEDINGS OF THE NATIONAL MUSEUM * vol.71 



sisting of about thirty distinct segments, most of which are elongate. 

 Eyes subglobular and very prominent. Pronotum above moderately 

 furnished with rather large but low tubercles; meso- and metanotum 

 almost smooth, the former with a few low scattered tubercles; inter- 

 mediate segment poorly defined, about one-third as long as the 

 metanotum. 



Legs rather short, especially the basally curved anterior femora 

 which are no longer than the mesothorax; the legs are unarmed 

 except that the femora have a couple of sharp triangular teeth near 

 the apex on the posterior margin beneath; tibiae about equal in 

 length to their respective femora except the anterior ones which are 

 a little longer; the anterior femora are very slightly undulate dor- 

 sally. 



Abdomen moderately slender, the basal four segments subequal in 

 length, each about three times as long as broad; fifth segment a little 

 shorter than the previous and the eighth one somewhat shorter than 

 the fifth; seventh and eighth segments decidedly broadened and sub- 

 equal to each other in length, each being about as long as broad, the 

 seventh broadest posteriorly ; ninth segment considerably longer than 

 the preceding one and much narrower, strongly compressed and with 

 the tip fissate; supra-anal plate not evident; operculum triangular, 

 about as long as the segment from which it arises, apically angulate, 

 ventrally carinate and basally noticeably swollen. Cerci ventral, 

 very short, not nearly reaching tip of last abdominal segment. 



Female. — Very like the male but less slender and differing in the 

 following particulars: The tubercles of the head and thorax are 

 decidedly larger and more numerous and the abdomen also bears 

 some very low tubercular roughnesses. Anterior femora much more 

 broadened beyond the subbasal sinuation than those of the male. 

 Second segment of the abdomen about one and one-half times as long 

 as broad; ninth segment broadly and briefly notched apically, the 

 lateral angles triangular and projecting backward; supra-anal plate 

 distinct, triangular, the tip pointed and the dorsal surface mesially 

 elevated into a rather high longitudinal carina; opercuUmi a little 

 more elongate than that of the male, more regularly scoop-shaped 

 and carinate ventrally; superior valves of the ovipositor simple and 

 slender, the inferior pair basally expanded and with a fingerlike 

 branch on the outer side; cerci more flattened than those of the 

 male. Color as in the male. 



Measurements. — Length, entire insect from front of head to tip of 

 abdomen, male 55, female 58 mm.; antenna, male about 35 mm., 

 broken in female, the longest remaining portion being 24 mm. ; meso- 

 notum, male 12, female 13 mm.; metanotum and intermediate seg- 

 ment together, male 8, female 9 mm.; anterior femora, male 12, 

 female 10.5 ram.; intermediate femora, male 9, female 9 mm.; pos- 



