AMERICAN IIYMKNOrTF.RA. 150 



The % has the face and space beneath eyes, ferruginous; otherwise like the 

 9. Length 3.i lines. 

 Ilah.—'DakoU. 



SCHIZOPYGA, Giav. 

 Schizopyga frigida, n. sp. — 9. — Black; mandibles, palpi, scape beneath 

 and toguI;iR, whitish; antennsie pale luteous beneath, fuscous above; face 

 slightly raised and flattened, opaque, front excavated, smooth and polished, as 

 also is the occiput, cheeks and thorax; wings hyaline, iridescent; legs short, 

 robust, honey-yellow; four anterior coxae and trochanters pale yellow; tips of 

 intermediate tibite and of their tarsi, tips of posterior femora, their tibite, ex- 

 cept base and broad white annulus about the middle, and their tarsi, except 

 base, black ; all the femora swollen; abdomen entirely black, somewhat-shin- 

 ing, minutely sculptured, the segments with lateral swellings most prominent 

 on basal segments. 



JIab. — Hudson's Bay Territoi-y. 



ARENETRA, Holmgren. 

 This geaus is easily distinguished from Lampi-onota,hj the head (es- 

 pecially,) and thorax being clothed with a dense, rather long, pubes- 

 cence. The species may be separated as follows : — 



Head and thorax clothed with black pubescence 1. canadensis, Cress. 



Head and thorax clothed with whitish pubescenec. ^ 



Tegulaj black. 



Posterior femora black 2. nigrita, "Walsh. 



Posterior femora ferruginous ^j. rufipes, n. sp. 



TeguUe yellowish-white 4. ventralis, n. sp. 



2. Arenetra nlgrita, Walsh, MS. — 9. — Black, head and thorax opaque, ab- 

 domen exce()t base shining; head, thorax and femora beneath with whitish 

 pubescence, most dense on face and cheeks; head and thorax coarsely and 

 rather closely punctured ; wings tinged with fuscous, nervures and stigma 

 black: anterior femora reddish-brown within, all the tibiiB and tarsi more or 

 less fuscous, tarsi paler; abdomen shining, impunctured; first segment trans- 

 versely depressed before apex and minutely, longitudinally aciculated, the 

 base deeply excavated; venter black; ovipositor about half as long as abdo- 

 men. Length 5 — 5i lines. 



.The % has the pubescence longer and much more dense; the wings clearer 

 and all the knees, tibias and tarsi yellow or reddish-yellow; the first segment 

 of abdomen much narrower, minutely, transversely rugulose, with a short 

 tubercle on each side between middle and base; narrow lateral and apical 

 margins of the second and following segments often more or less pale. Length. 

 4i — 5 lines. 



Ilab. — Canada 3 Massachusetts. Closely allied to aiiiiufcusis, from 

 which it is at once distinguished by the pubesence being whitish and 

 not black. 



3. Arenetra rufipes, n. sp. — 9 • — Difiers from nigriia as follows : — The knees, 

 tibite and tarsi, and also the jiosterior femora, except base, are ferruginous; the 

 basal segment of abdomen is minutely rugulose, but not aciculated before apex 

 as in nigrita; and the third and following segments have a very narrow yel- 



