PHALANGES OF THE UNITED STATES. 33 



Nebraska specimen, $, body, 0.4. Legs, (1) 1.2, (2) 2.1, (3) 1.2, 

 (4) 1.7. 



Eemarks. I have seen a single female of this species, 

 taken near this city, from which the above description 

 has been drawn up. In the collection made by Dr. Hay- 

 den, in Nebraska, were a number of female Harvest-men, 

 which present apparently the same specific characters as 

 the former, except that the legs are a little shorter. 

 Suites of specimens from the two localities would, how- 

 ever, probably show them to be distinct. The processes, 

 which I believe to be the rudiments of the antennae, are 

 in the Nebraska specimens remarkably large. I have 

 never received any males in the same collection as the 

 females, but append a description of a male Phalangium, 

 which may be referable to this species. Prof. E. D. 

 Cope collected two specimens in Western Virginia, and 

 a third has been received from the Essex Institute, from 

 an unknown locality. 



P. VENTEICOSUM? 



Male. — Dorsum ferruginous brown, covered with numerous tuber- 

 cles, witli a very obscure central marking. Eye eminence moderately 

 pronounced, blackish, smooth, with a faint, median, brown line, with- 

 out crenulations or with very obscure ones. Cephalotliorax, with a 

 very deep, transverse line behind the eye eminence. Abdomen very dis- 

 tinctly separated from the cephalothorax by a strongly pronounced, 

 curved, impressed line, remarkably conical. Ventral surface light 

 brown, covered with small tubercles. Coxce of the same color, dis- 

 tally tipped with white, much roughened on the inferior surface with 

 small spinous tubercles, with a row of the same on the lateral bor- 

 ders. Trochanters brownish. Legs very slender, of the same color as 

 the dorsum but darker, with very small blackish spines. Palpi slen- 

 der, moderately long, roughened with small spinous tubercles, their 

 angles not prolonged. Penis flat, nearly straight, slender at the basal 

 portion, gradually widening, and distally rather quickly expanded into 

 a In-oad alate portion, and then abruptly contracted into a moderately 

 robust slightly curved point, which is placed at an angle to the rest of 

 the shaft ; at the base of the point a marked notch in the end of the 

 shaft. 



COMMUNICATIONS ESSEX INSTITUTE, VOL. VI. 5 AUG., 1868. 



