4 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 63. 



cylindrical, loosely joined, thickly covered with short pubescence; 

 thorax longer than wide, higher than wide, convex above; notauli 

 usually absent, sometimes complete; mesonotum separated from the 

 scutellum by a suture; scutellum more or less triangular in outline,, 

 rounded apically, thickly covered with appressed pubescence; pro- 

 podeum with two parallel, median, elevated carinae; propodeum on 

 each side with a ridge running from the base of the posterior wing 

 to the base of the hind coxa; wings pubescent, distinctly ciliate 

 marginally; abdomen as in Platygaster but the second tergite not 

 striate and the basal foveae frequently indistinct; in the specimens 

 studied the abdomen in the female is in no instance much longer 

 than the head and thorax united. 



TABLE TO SPECIES. 



1. Abdomen in female twice as long as wide 1. calif ornicus Aehmead. 



Abdomen in female distinctly less than twice as long as wide 2. 



2. Abdomen short, 0.60 mm. long 2. occidentalis Ashmead. 



Abdomen longer, 1.77 mm. long 3. petiolatus Ashmead. 



1. AMBLYASPIS CALIFORNICUS Ashmead. 



Amblyaspis californicus Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 268. 



Female. — Length 1.7 mm. Head twice as wide as long, as wide as 

 the thorax; frons very faintly reticulate, subopaque; lateral ocelli 

 nearer to the anterior ocellus than to the eye margin; vertex bounded 

 posteriorly by a high and sharp ridge; flagellum three-fourths as long 

 as the abdomen, the joints thickly covered with short white hairs; 

 pedicel shorter than joints three and four united, two and one-half 

 times as long as wide; joints three and four thicker, a little longer 

 than wide; joints seven to nine quadrate, slightly produced apically on 

 the outside; last joint conical, as long as the ninth, a 

 little longer than wide; thorax elliptical seen from 

 M%A above, convex dorsally, two-thirds as wide as long; 



mesonotum faintly reticulate, subopaque, squarely ex- 

 cised posteriorly; notauli absent; abdomen as long as 

 the head and thorax united, as wide as the thorax^ 

 polished, the apical tergites punctulate. Mahogany- 

 P ^ > pu r colored; scape reddish-yellow, tinged with fuscous 

 -^p^^ toward the apex; pedicel and flagellum dark brown; 

 legs yellow, the posterior coxae and posterior femora 

 apically a little darker. 

 ^'cluF^nmcisTsB. Male.— Length 1.35 mm. FlageUum, including the 

 MEAD. Abdomen pedicel, as long as the thorax, the joints cylindrical 

 OF FEMALE. ^^^| (jovercd wlth short erect hairs; all antennal joints 



except the third longer than wide; fourth joint twice as long as the 

 third, cylindrical, two times as long as wide; joints six to nine sub- 



