240 ASHMEAD [ 2 34] 



first tarsal joint and joints 2, 3 and 4, black (rarely reddish-brown 

 with tips of tibiae fuscous or black as in male) ; orbits, face below an- 

 tennae, cheeks, mandibles, scape beneath, lemon-yellow ; the apex of 

 joint i and joints 2 to 4 of hind tarsi yellowish-white ; palpi and tegulaa 

 white ; front and middle legs reddish-yellow ; wings hyaline, irides- 

 cent, the costae and internal veins brown, the stigma yellowish. 



Male. Agrees well with the female, except in the usual sexual 

 differences in the antennas and abdomen, and in having the hind legs, 

 except the tips of tibiae and the tarsal joints yellowish-white, not black 

 but reddish-brown, while the front and middle coxae and trochanters 

 are yellowish-white. 



A single male supposed to be a variety of this species, agrees fairly 

 well with the normal form, except that the temples and the thorax, 

 except the mesonotum and the scutellum are wholly black. 



Type. Cat. No. 5679, U. S. Nat. Museum. From Sitka, June 

 16 ; Muir Inlet, June n ; Virgin Bay, June 26 ; Yakutat, June 21 ; 

 and Kukak Bay, July 4. 



Tribe CAMPOPLIGINI. 



Genus Campoplex Gravenhorst. 



CAMPOPLEX LATICINCTUS Cresson. 



Campoplex laticinctus CRESSON, Proc. Ent. Soc. Phila., iv, p. 283, 9, 1865. 



PROVANCHER, Fn. du Can. Hym., p. 362, 1883. CRESSON, Syn. 



Hym. N. Am., p. 202, 1887. 

 Campoplex nigripes PROVANCHER, Le Nat. Can., vi, p. 145, 1874. 



Type in collection of the American Entomological Society. From 

 Kukak Bay, July 4 ; Pribilof Islands, July 12 ; Virgin Bay, July 20. 



A common species, found throughout the Northern States, New 

 York, White mountains in New Hampshire, Maine, Colorado, Kansas 

 and Canada. 



Genus Zachresta Forster. 



ZACHRESTA POPOFENSIS sp. nov. 



Male. Length 7.5 mm. Black, coriaceous, the depressions at 

 sides of the prothorax and the disk of the mesopleura lineated ; the 

 mandibles and the legs, except the front and middle coxaa above, the 

 hind coxae entirely, first joint of their trochanters and the apex of the 

 hind tibiae and tarsi which are black, are red ; the hind tibial spurs and 

 annuli at base of tarsal joints i to 3 are, however, white ; palpi and 

 tegulae yellowish-white. Wings hyaline, the stigma and veins brown- 

 black ; the areolet is petiolate, receiving the second recurrent nervure 

 a little beyond its middle. Metathorax rather short, its posterior face 



