2 54 Bulletin of Laboratories of Denison University [Voi. xi. 
the whole structure scarcely extending to the base of the claws. 
Wings wholly very pale shining flavescent, transparent, without 
markings, the pterostigmal regions slightly darker; neuration 
very pale; the transverse nervures conspicuously whitish, if the 
wings be held against the light; subcosta terminating about 
the middle of the costa in both pairs. (From the description 
of McLachlan). Female unkonwn. 
Length of body 7-8 mm. Expanse 20-24 mm. Habitat, 
Mt. Hood, northern Oregon. Described from nine males. 
Boreus Latr, 
The genus Boreus was described by Latreille in 1825 in 
Cuvier’s Animal Kingdom. It contains small dark colored, 
saltatorial insects. Wings of female rudimentary, of male im- 
perfect; no ocelli present in either sex. The females differ from 
all others of the family in our fauna, in having a long protrud- 
ing ovipositor, in some cases nearly as long as the abdomen. 
Only seven or eight species have been recognized. 
Hagen has published a treatise of the genus in the Ent. 
Mon. Mag. 3-132, 1866. In this paper he considered two Eu- 
ropean species and the two species from eastern United States. 
The following key will aid in separating the four species 
of our fauna : 
1. Ovipositor at most little more than half as long as the abdo- 
men, eastern species, ..... 2. 
Ovipositor much more than half as long as the abdomen, 
western species, ...... 3. 
2. Legs fulvous with a narrow dark colored annulation at each 
joint, last three joints of tarsi black, nivoriundus. 
Legs and ovipositor black, . . . brwnalis. 
3. Legs and ovipositor brown, joints of the legs dark, almost 
black, base and apex of the ovipositor dark, californicus. 
Legs and ovipositor black, unicolorous, . unicolor. 
Boreus nivoriundus Fitch. 
Boreus nivoriundus, Fitch, Am. Jour. Agr. 5-277 ; Fitch, 
Trans. Ent. Soc. of London, 2nd series 1-96; Hagen, Neurop. 
N. A. 240; Lintner, 2nd Rep. Ins. N. Y. 237. 
