OF WASHINGTON. 297 



the length of the scape, very slightly thickened and obliquely truncate at 

 tip, black; the scape is cylindrical, slender, pale ferruginous, and does not 

 reach beyond the anterior ocellus. Collar triangular, the posterior margin 

 emarginate ; prosternum rhomboidal with a central impressed line ; mesono- 

 tum impressed, trilobed, of the usual shape in the genus, the middle lobe 

 convex, terminatingat two-thirds the length of the mesonotum, shagreened, 

 the lateral lobes carinate, the depressed space between and the posterior 

 edge of middle lobe smooth, shining, impunctate ; scutellum large, sub- 

 convex, rounded, the lateral pieces at base triangular; metathorax ob 

 liquely sloping with a deep central channel, the metapleura smooth with 

 the spiracles elliptic and placed at their base. Abdomen ovate, truncate 

 behind, flat above, boat-shaped beneath, the first segment the longest, 

 segments 2 to 5 shorter, about equal, the following retracted or shortened. 



Male. Length, 2.1 mm. Agrees with the 9 ^ n color, except that the 

 legs are not ferruginous beneath and the middle and posterior tarsi are 

 white ; wings clear hyaline, with the nervure pallid. It differs structurally 

 in not having the mesonotum impressed, but showing only slight impres 

 sions between the middle and lateral lobes; eyes finely pubescent; the 

 mesopleura have a distinct femoral furrow or impression ; middle tarsi 

 not dilated and combed or pectinate beneath, the posterior tibiae being 

 compressed. 



Hab. California. 



Described from I d* and 2 ? specimens received from Dr. H. 

 C. McCook. reared July 27, 1891, from the eggs of a spider, 

 Argiope argentata. 



In the very wide head, the absence of antennal furrows, the 

 widely separated antennae, and the flat hind tibia? of the J\ this 

 species is easily separated from any described Eupelmid. It 

 comes nearest to Metapelma Westwood, but in this genus the 

 posterior tibiaa and tarsi in both sexes are broadly dilated, the 

 middle legs being normal, while there are other characters that 

 separate it. 



21. Eupelmus drassi Riley n. sp. 



Female. Length, 3 mm. Head golden green, closely punctate; thorax 

 at sides and beneath, and legs, light brown or brownish yellow; the upper 

 concave surface of the collar violaceous ; mesoscutum blue-green, sparsely 

 covered with a short, whitish pubescence; scutellum metallic brown ; 

 axillae reddish yellow; metathorax greenish; the metapleura distinctly 

 violet; mesopleura posteriorly dusky; middle tibiae, except distal ends, 

 and the hind legs, except the coxae behind and on the knees, fuscous; 

 hind coxae behind black ; all tarsi, except the last joint, yellowish. 



Antennae (broken after the third joint) with the scape brownish yellow, 

 the joints of the flagellum which are left brown. Front wings, except the 

 basal one-third which is hyaline, fuscous with an interrupted transverse 

 band beyond the middle, composed of two large oblong white spots that 



