40 Proceedings of the Biological Societg of Washington. 
at vertex; orbits not ditleientiated from central stripe at any part, the 
sin^de orbital bristle rather weak, and but little anterior to the transverse 
line of the anterior ocellus; surface of frons almost l)are, a short, uniserial 
row of hairs on lower part of frons close to eye margin; at middle of 
frons, in tyjje specimen, there is a transverse depression, which is carried 
down to some extent on either side, giving the frons a rather distinct 
concavity; hmule rather small, arched; face broad, the eye margins 
sloping away very rapidly, so that at the lower margin of eye the face is 
twice as Iwoad as at lower margin of frons; antennae short, falling l)ut 
little short of epistome, third joint slightly longer than broad, rounded at 
ai)ex, arista hare, slightly swollen, and geniculated at base, its length 
equal to anterior width of frons, cheek about one-fourth the height of 
eye, margin with short hairs, and a distinct bristle very similar to that 
which occurs in vibrissata, i)alpi slightly spatnlate. iMesonotuni with the 
discal hairs comparatively rather short and sj)arse, tlie anterior pair of 
dorso-centrals much reduced in size; scutellum with the basal pair of 
bristles placed well back from the lateral margins, no hairs on scutellum 
besides the bristles. The ovii^ositer ends in an acute point, without the 
preapical constriction as in polita Say. Fore and mid femora with bristles 
on the ventral surfaces, which are not very strong, the hind pair without 
bristles; tarsi not particularly tbickened. Last section of vein 4 aljout 
Ijl^ times as long as penultimate section ; inner cross vein at beyond end 
of auxiliary vein; outer cro.ss vein slightly waved; la.st sections of veins 
d and 4 slightly convergent. Lengtli, 2.75 mm. (exclusive of ovi{)Ositor). 
Localltji. —Washington, 1). (b, INfay 29, i;)12(W. L. IMcAtee). One 
specimen. 
Type in collection of W. Jj. McAtee. 
This may be tbe species Melander lists in his i)aper on the family* as 
parvicornis Zett., but T consider that it is not identical with the Euro¬ 
pean f(jrm and even if I \vere mistaken as to this the juime parvicornis is 
not tenal)le, so that the name here given will have to be ado])ted for our 
American si)ecies. 
Lonchaea quadrisetosa sj). nov. 
Femate .—(ilossy black. Frons slightly shining; orbits to just below the 
orbital bristle, and the ocellar region glossy; antennae brown-black, 
arista concolorous; face and hmule viewed from above with whitish i)ol- 
linosity; pali)i and i)roboscis black. INIesonotum, scutellum and pleurae 
glossy black. Abdomen glossy black, without distinct pollinosity. Legs 
glossy black, the tarsi opaque, brown black, but not at any part yellow. 
Squamae and their fringes deep brown. Halteres black. Wings slightly 
smoky, veins brown. All hairs and bristles black. 
Frons parallel-sided, one-third the width of head, surface covered with 
distinct sparsely scattered hairs; orbital bristle strong; bristle on dorsal 
surface atapi'x of second antennal joint as long as breadth of third joint, 
hair-like; third joint about I3l>tiiiuxs as long as broad, reaching threi^-fourths 
* l*s.V(‘Iie, Vol. 20, 1913, 1 ). 57. 
