MflUoch—Flame Undesrrihed Kavlh Amerirai) Fapramj/zidfe.- o7 
on almost the exact liiu' of tla‘ miicli weaker aerosiielials, postei’iorly tlu; 
acrostichals ai-e nuieli weakei- than tliis pair, and aiiU'riorly tlu‘,aerostielials 
are weak hairs; in pliiladi'lphica the dorso-eentrals are four in nninher, 
the anterior pair beinij; in front of sntnre and sli^litly more wi<1ely sei)a- 
rated than the posterior pairs, while the acrostichals are carri(*d forward 
to at least the transverse line of the anterior pair of dorso-eentrals at 
almost the same strength on their whole extent, anterior to this j)ai't they 
are rei)resented by weak hairs. This ditierence holds good for both sexes. 
The genitalia of the males pre.sent minor differences which snp))oi't the 
evidence of tlu‘ throacic chaetotaxy. I have not sniHcient material to 
permit of the dissection of those organs at i)resent before me, but an 
examination of the type s})ecimen of incerta the onter lamella shows that 
the lower arm is slender and directed downward on the apical half, 
whereas in philadelphica this arm is considerably tbicker, somewhat 
si)atnlate at the ti}) and but little deflected ; the central lobe-like processes 
in incerta are ratber smaller tban in pliiladelpJdca and rather shorter 
haired. The legs are similar in the si)ecies, and the wings in both are 
marked as in similata. 
Localiti /.—Plummers Island, IMaryland, August, 11)12. Three females, 
including tyj^e. 
Allotype. —Washington, I). C., September 2, 1907. One male. 
In collection of W. L. IMcAtee. 
There are two examples, a male and a female, in the collection of the 
Illinois State Laboratory of Natural History, the male from Urbana, Illi¬ 
nois, September 15, 1891 ( Marten), and the female from Aldridge, Illinois, 
Angust, 1891 (Hart and Shiga). 
Lonchaea vibrissata sp. nov. 
(Fig. 1.) 
Female .—tJlossy blue-black. Antennae brownisb black, surface of (bird 
joint with a wbitish bloom; face distinctly white i)ollinose; pali)i black. 
.Mesonotum and abdomen without traces of ]iollen. Legs black, basal 
two joints of all tarsi bright fulvous. Calyptrae yellow, fringe brownish. 
M'ings clear, veins yellowish. Halteres hlack, stalk yelloM’. 
Frons occupying about one-tbird the width of head, slightly wider at 
center than at vertex or anterior margin; bri.stling normal, surface hairs 
weak; from above middle the surface is pitted with large irregular punc¬ 
tures which extend to the surface of the lunule; antenna reaching barely 
to the epistome, rather short, third joint less than twice as long as its 
greatest breadth; arista bare; cheek narrow, the gloi^sy lower posterior 
])art with numerous short hairs, and near to the anterior margin one 
strong, up-turned bristle. Tborax baired as in polila Say. Abdomen 
with seven distinct .segments. Wing veins f) and 4 slightly convergent at 
ainces; last section of fourth vein longer than i)enultimate section (:).2), 
outer cross vein about two-thirds as long as si'ction of 4 anterior to it. 
Length, 2.5-3 mm. 
Locality. —Algoiupiln, Illinois, October lb, 1894 (Dr. Nason)- Para- 
