SUBFAMILY VII. CORYDIIN.1C. 107 



This, the largest cockroach found in the United States, is 

 established at Key West, Fla., where it was taken by R. & H. in 

 numbers July 7, 1912, from beneath boards in a wood shed, and 

 first recorded by them (1914c, 381) as Blaberus atropos (Stoll). 

 "It was well known to the natives about Key West, where it is 

 found in wood piles, under boards and other refuse about the 

 town. The insects, when exposed, either remained motionless or 

 scuttled toward another place of concealment with no great speed. 

 The nymphs were usually found half buried in loose, damp earth 

 under boards, where thej' remained motionless, looking much like 

 lumps of earth until disturbed." It is a Tropical American spe- 

 cies, common in Cuba, Mexico and British Honduras. 



Subfamily VII. CORYDUN^;. 



Head globose; ocelli absent or minute, the ocellar areas not 

 strongly defined; pronotum and tegmina when present in part 

 rather thickly covered with hairs ; middle and hind femora un- 

 armed, or with only one or two apical spines. Two genera 

 are represented in Florida. 



KEY TO EASTERN GENERA OF CORYDIIN^E. 



a. Ocelli present, very small, convex; pulvilli and arolia present; teg- 

 mina present in both, sexes. I. HOLOCOMPSA. 

 aa. Ocelli absent; pulvilla and arolia wanting; tegmina absent in female. 



II. COMPSODES. 



I. HOLOCOMPSA Burmeister, 1838, 491. (Gr., "elegant.") 



Very small species having the eyes widely separated, ocelli 

 very minute ; tegmina divided obliquely into two portions, the 

 basal one opaque and hairy, the other membranous and glabrous; 

 wings as long as tegmina, their veins mostly subobsolete, the dis- 

 coidal vein with an elongate costal swelling; supra-anal plate in 

 both sexes feebly bilobate; subgenital plate of female valvular 

 with basal margins of valves forming an acute keel ; lower front 

 margins of fore femora armed on apical half with a row of min- 

 ute spines and with two stout apical spines, the last one much 

 the longer; tarsi small, first and second joints with minute sub- 

 apical pulvilli, third and fourth joints with larger ones; arolia 

 present. 



37. HOLOCOMPSA NITIDTILA (Fabricius), 1871, I, 345. Small Hairy Roach. 



Male Head, under surface and legs blackish; antennae blackish with 

 three or four joints on apical half pale; pronotum and opaque basal por- 

 tion of tegmina black with a greenish tinge; wings and apical portion of 



