2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 69 



tion I : II : III : : 32: 34: 30 (IV missing), I longer than head and 

 anterior lobe of pronotiim conjoined. Rostrum extending to pos- 

 terior coxse, segment I as long as thick, II and III subsequal, each 

 twice as long as IV. Pronotum broader than long, collar short, 

 anterior lobe arched, shiny; posterior lobe strongly raised, evenly 

 punctate, humeri rounded, basal margin reflexed and emarginate. 

 Legs long, anterior and intermediate femora of equal thickness and 

 uniformly thick throughout their lengths, provided beneath and 

 above Avith long slender spines. Anterior tibiae longer than anterior 

 femora. Abdomen beneath thinly clothed with fine hairs, not sharply 

 set off from connexivum. Genital segments large, strongly keeled, 

 ovipositor very prominent. Length 6 mm. Width 1.4 mm. 



Described from one specimen (allotype) bearing the label, R. J. 

 Crew, 5-6-'01, Demerara. In National Museum. 



The genus Pamchnocoris^ apparently intermediate between the 

 genera Arachnocons Scott and Nobis Latreille, was erected for a 

 single species {P. cMoro'pterus Renter)^ described from a male speci- 

 men (holotype) collected by R. J. Crew (Crow?), Demerara. The 

 genus is characterized by the head being distinctly declined anterior 

 to the eyes and produced posteriorly into a short parallel-sided col- 

 umn, the pronotum being as wide as long, constricted distinctly 

 before the middle, with collar short, anterior lobe arched, smooth 

 and shiny, posterior lobe strongly raised, thickly and evenly punc- 

 tate, hind margin slightly reflexed and emarginate. Hemielytra 

 with veins obsolete. Anterior and intermediate femora long, slightly 

 incrassate, equally thick throughout their lengths and armed beneath 

 their apical halves with a double row of moderately long, remotely 

 spaced spines. 



6. NABIS SORDIDUS Renter 



Mexico. Tamos, December 7, 1908, F. C. Bishopp, collector; 

 Oxaco, September, 1918, L. O. Howard, collector. Panama : Paraisa, 

 Canal Zone, April 24, 1911, Aug. Busck, collector. Cuba: Santiago 

 de Las Vegas, February 22, 1923, B. Baretta, collector. West Indies : 

 Grenada, Paraisa, H. H. Smith; Southern Francisco Mountains, 

 Santo Domingo, September 15, 1905, Aug. Busck, collector. 



7. NABIS SPINICRUS Renter 



Panama: Tabernilla, Canal Zone, May, July, 1907, Aug. Busck, 

 collector; Paraisa, Canal Zone, January 16, 1911, Aug. Busck, col- 

 lector. British Guiana : Essequebo R., July, 1921, Aug. Busck, col- 

 lector. West Indies: Southern Francisco Mountains, Santa Do- 

 mingo, September, 1905, Aug. Busck, collector. 



1 :Mem. Soc. Eiit. Belg., vol. 1.3, 1088, p. 29. 



