206 bulletin: museum of comparative zoology. 



Second tergite extending below level of lower end of collum, flattened below. 

 Collum finely margined below and about anterolateral corner, not otherwise 

 striate, smooth. 



Striae of metazonites on lower sides sharply impressed, those of the pro- 

 zonites more lightly impressed, curving upward at anterior ends, especially 

 the upper ones which occur farther dorsad than those of the metazonite but do 

 not attain the level of the pore. Tergites crossed by two sutures both of which 

 are distinct entirely across dorsum; the anterior one of these takes its origin 

 near level of pore. Posterior margins of most scobiniferous tergites with 

 posterior margins strongly sinuate over each scobinum of succeeding plate. 

 Scobina extending from seventh to thirty seventh segments. 



Anal tergite much exceeded by the valves. The latter strongly compressed, 

 their mesal borders elevated. 



In the gonopods of the male the anterior median plate has the median 

 distal tongue of a sublanceolate form, narrow proximally and with apex 

 narrowly rounded; the distal margin of basal part on each side is straight, at 

 right angles to axis of tongue but with ectal corner on each side rounded. 

 Telopodite of posterior pair with both branches very slender, the inner one 

 curving mesad and diverging from the other; the latter curving first gently 

 caudad of mesad and then more strongly caudad at tip. 



Number of segments, forty-seven or forty-eight. 



Length (male), 48 mm.; width, 4.2 mm. 



A species characterized by its peculiar coloration, which is brown to 

 reddish brown with caudal borders of somites darker, the color typi- 

 cally of a reddish cast; the legs of the male brick-red, those of the 

 female ordinarily paler and less reddish. The color in general often 

 suggests that of Trigoniulus luynhricinus. 



591. DiNEMATOCRICUS PATRUELIS, sp. nOV. 



Type.— M. C. Z. 4,925. Paratypes.— M. C. Z. 4,926. Solo- 

 mons: Pamua (W. M. Mann). 



The entire body uniform shining black with legs ferruginous. 



Sulcus on head of male typically continuous though weaker in the frontal 

 and again in the upper clypeal region where in the female, at least, it is some- 

 times vague or absent. Clypeal foveolae 2+2. 



Collum as usual widely rounded and shortly weakly marginate below. 

 Second tergite extending much below collum, flattened beneath. 



Segmental suture absent or very vague in upper dorsal region on all somites, 

 distinct just above pore and down sides, curving closely about pore which is 

 in Une with it. Scobina very broad but few in number, not extending caudad 

 of fourteenth segment. Above the scobina the margin of the preceding tergite 

 in each case obviously sinuate. 



