H. M. PARSHLEY 
93 
Cruz Mountains; Sonoma County. Mexico: Izanial, Yucatan, I\' (C. H. 
T. Townsend). P.\xam.\: Las Ca.sca(las, Canal Zone, III, o, 1901) (A. H. 
•Jennings). Br.\zil: Rio Janeiro. [West Indies, see. Rergrotli.] 
Description. — Black; antennae usually pale brown excejit first segment 
and base of second; cells of coriuni and membrane whitish hyaline; jiosterior 
margins of connexival segments and inner margins of genital lobes yellowish 
white; rostrum and legs brown. 
Head slightly broader than long (21 to 20), about as long as pronotum; 
tylus short, sides parallel; impressions of vertex short, broad, shallow, liroadly 
connected posteriorly; ])reocular tubercles distinct, obtuse; antenniferous 
spines rather short and stout, slightly divergent, without lateral tooth; 
postocular tubercles obsolescent; antennae (hg. .oilc) moderately slender, 
much shorter than head and pronotum together (2S to 40), the hrst seg- 
ment reaching about to middle of tylus, length of second about ecpial to 
width of head between eyes; i)roportions of the segments slightly variable; 
rostrum extending about to base of prosternum. I’ronotum (fig. .add) strongly 
convex, the lateral margins slightly expanded, distinctly reflexeil, granulate; 
carinae distinctly elevated. Scutellum elongate, triangular, longer than 
pronotum (20 to 20); sides strongly elevated; disc slightly elevated near 
base; apex extremely narrowly rounded. Ilemielytra (cf 9) extending to 
genital lobes or further, corium to ba,se of fifth segment: (cf) nearly parallel, 
covering most of abdomen, or ( 9 ) a little narrowed apically, exposing con- 
nexivum at sides; exocorium very slightly ex])anded at base; mesocorium 
with one to three, endocorium without distinct tran.sver.se veins; veins of 
membrane simple, .\bdomen oblong, lateral margins entire. 
cf (hg. .o3b). Fifth ventral segment distinctly shorter than sixth, which 
is transverse and sinuate at ajiex medially; genital segment very short, mod- 
erately convex, fenestrate. Length, 3.7.o to 4.2,5 mm. 
9 (hg. .53a). Dorsal genital segment transverse at apex. Length, 4.5 
to 5 mm. 
Type speeiineii (Brazil) in the Stockholm Museum. 
This species is found throu«;hout the New W'orld, exceiit in 
the most northern and southern regions, thus inhahiting most 
of the faunal zones, and yet it exhiliits no consideralde degree of 
variation and is always easily recognized. Its chief distinguish- 
ing characters are in the structure of the antennae and pronotum, 
the peculiar male genital segment, and the hyaline memhrane. 
As remarked by Bergroth (188()), the color of the antennae is 
variable; usually light lirown, but sometimes nearly lilack or 
dull white. 
TK.WS. .\M. EXT. SOC., XLVII. 
