VOL 



,}"•] PROCEEDINGS OF THE NATIONAL MUSEUM. 421 



black, except the petiole, which is pale basally and margined at apex 

 with yellow ; the hypopygiuin in the male is pale yellow. 



Habitat. — Washington, D. C. 



Described from three specimens, reared April 18, 1885, from a Bug- 

 culatrix found on the trunk of a beech tree. 



PEZOMACHUS Gnivenhorst. 

 Pezomachus flavocinctus sp. nov. 



Female. — Length 4 mm ; ovipositor l mm . Head, thorax, antennae, ab- 

 dominal petiole, and legs ferruginous; abdomen piceo black, the peti- 

 ole and second segment margined at apex with yellow. The whole in- 

 sect is densely minutely punctulate ; head transverse, narrowed behind; 

 clypeus transverse, separated ; mandibles terminating in two black 

 teeth ; antennae more than 23-jointed (tips broken off), nearly as long as 

 the whole insect. Anterior lobe of thorax longer than the posterior 

 lobe; metanotum smooth without any keels; body of abdomen long 

 oval, densely covered with a short sericeous pubescence. 



Habitat.— Texas. 



Described from one specimen in Belfrage collection. This species 

 approaches nearest to P. meabilis Cress., but it is much larger. 



Pezomachus californicus sp. nov. 



Female. — Length 2.1""" ; ovipositor 0.6 mm . Head and abdomen, ex- 

 cept the petiole, black; thorax, petiole, legs and antennas dark-brown. 

 The insect is densely minutely punctured, the head and abdomen shin- 

 ing. The antennae are short (broken at tips), and evidently slightly 

 s ubclavate; mandibles, except the black teeth and the palpi, are pale. 

 The two lobes of thorax are about equal, the metauotum showiug 

 slight traces of a keel at the sides of the posterior face. The sutures 

 of the trochanters and the suture between the petiole and the second 

 abdominal segment are pale-yellowish. 



Habitat. — Los Angeles, California. 



Described from a single specimen received from Mr. Albert Kcebele. 



Pezomachus alaskensis sp. nov. 



Female. — Length 2.6 mm ; ovipositor the length of the petiole. Brown 

 black, the head black, aud the extreme apical edges of the abdom- 

 inal segments piceous Densely minutely punctured, shining; an- 

 tennae broken, pale brown, palpi and legs yellow ferruginous. The 

 hind lobe of the thorax is a little longer than the front lobe, the ob- 

 lique face having a delicate carina along the superior edge. Abdomen 

 ovate, covered with a tine, short, sericeous pubescence. 



Habitat. — Nushagak River, Alaska. 



Described from one specimen collected by McKay. 



