]04 FAMILY II. BLATTID^E. THE COCKROACHES. 



of female usually slightly surpassing the apex, often a little 

 shorter; subgenital plate of male without styles; femora all with 

 a single stout apical spine beneath; lower front margin of fore 

 femora fringed with hairs, the basal ones the longer, those on 

 apical half spiniform; arolia small. The male of our only species 

 has been found but once in this country, although more than 400 

 females have been taken and recorded. 



35. PYCNOSCELTJS SUKINAMENSIS (Linnseus), 1767, 687. Surinam Roach. 



Female Head and most of pronotum shining blackish-brown; teg- 

 mina dull brownish-yellow; clypeus and front margin of pronotum yellow, 

 this often extending very narrowly along the sides; legs and under sur- 

 face brownish-yellow, the sides and apex of abdomen darker. Head flat- 

 tened, sparsely punctate, the interocular area equal in width to that be- 

 tween the large ocellar spots. Pronotum evenly convex, widest behind the 

 middle, hind angles rounded, front ones wanting, disc finely and sparsely 

 punctate. Basal half of tegmina with rows of punctures each side of the 

 veins. Supra-anal plate twice as wide as long, apical half finely carinate 

 at middle, apex broadly rounded. Cerci very short, acute, their separate 

 segments indistinct. Subgenital plate large, convex at base, concave 

 along the sides near apex which is rounded. Male More slender, the teg- 

 mina much longer, supra-anal plate more delicate in structure, more pro- 

 longed, broadly rounded, not carinate. Cerci much longer than in 9 , 12- 

 or 13-jointed, the apical joints much the longer; styles absent. Subgenital 

 plate more than twice as broad as long, its apex slightly incurved, subtrun- 

 cate, feebly and broadly emarginate. Length of body, $ , 16.8, 9 , 16.3 

 23; of pronotum, $, 4.8, 9, 4.85.8; of tegmina, $, 18.9, 9, 13.6 19 mm. 

 Width of pronotum, $,5, 9, 5.9 7.6; of tegmina, $ , 6, 9, 5 6.7 mm. 

 (Fig. 45, A.) 



Ormond, Sanford, Dunedin and Sarasota, Fla,, Nov. to March ; 

 beneath chunks, piles of weeds and other cover (TT 7 . 8. B.}. Re- 

 corded from 14 additional localities in all parts of Florida. It is 

 a circumtropical species, established in the southern States from 

 Brownsville, Texas, east to and throughout Florida, and often 

 found as adventive in greenhouses as far north as New England. 



Hebard (1917a, 196) states that in addition to the large series 

 from the southern States, he examined "nearly 200 specimens, 

 chiefly from the West Indies and Mexico, without finding a single 

 male, adult or immature, from the American Continent. This may 

 possibly indicate that with us the species is parthenogenetic." 



Davis (1910a) says that 66 specimens from southern Florida 

 taken by him were all females, but that among seven individuals 

 found January 12, among the straw in the winter quarters of the 

 giant land turtles in the Reptile House of the New York Zoolog- 



