II. C. FALL 
;^oi 
This species is less difficult to identify by superficial cliarac*- 
ters than many others, the smallish size, rather narrow form, 
uniformly bronzed surface, the female evidently thou<i;h v(‘ry 
finely alutaceous, the male scarcely visibly so, the rufous anal 
segment, forming a combination of characters which fits noth- 
ing else. It seems to be especially abundant in the more south- 
ern part of its range. Regimliart mentions receiving a small 
flask of alcoholic material from ^Missouri, among which were 
three thousand examples of this species, from which he con- 
cludes quite naturally that it must ])e “prodigiously common.” 
I have nij^self received from Prof. Bradley two vials of speci- 
mens from Silver Siirings, Arkansas, containing probably two 
thousand examples, all of which appear to be analis. 
2t). Gyrinus opacus Sahll)erf>; 
f )f niodiuin size, not very convex; Mack, sides more or less (wident ly bronzed, 
usually ratin'!' ol)sc!irely so; luster nit her dull, o\vinf>: to the very tine :ilu- 
laci'ous sculpture; there is also a very Tiiinute scafteri'd jainct ulat ion which 
is somewhat variable in development; st-rial jium.tures rather fine and only 
a little larger laterally. Body beneath black, front legs dark rufous, their 
tibiae and tarsi tinged with piceous; middle and hind legs piceo-rutous, the 
tarsal claws yellowish. 
genitalia . — Piceous or brunneo-piceous; middle lobi^ gradually nar- 
rowed from base to apex, carinate above, about four-fifths as wide ajiically 
as the lateral lobes, the tip angulate or subangulate. 
Length, 4.8 to 0.2 mm.; width, 2.5 to 3. .3 mm. 
This species ranges entirely across the continent from Laltra- 
dor to Alaska. Specimens are before me from West St. Modest, 
Labrador (Sherman Coll.): ('ochrane. Northern Ontario (Not- 
man — listed as picipes^): Kettle Rapids, iManitoba (Wallis): 
iMlmonton, Alberta (Carr): Pigeon Cov(', Alaska Peuinstda 
( Kusche — sent by A'au Dyke), ddu' Ituropt'an dist I'ilmtion as 
given by Sharp, is “ai'ctic Norway mid Lapland southwards 
to the Highlands of Scotland.” It occurs also in Iceland and 
Creenland. 
This is the only species in our fauna with legs so dark as to 
merit the name picipes, and as remarked by Blanchard in the 
letter cpioted by ]\Ir. Sherman in his Labrador List,^ if seems 
as though it ought to be the piapes of Aube, but whatever may 
•^Journ. X. Y. Ent. Soc., xxvii, p. 92, (1919). 
XJourn. X". Y. Ent. Soc., xxviii, p. 188, (1910). 
TR.\NS. AM. EXT. SOC., XLVII. 
