112 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



This species comes quite close to L. 6-dentatus, but is distinguished 

 at ouce from that species and all the others by the brevity of the 

 stigmal nervure and in havitig the abdomen pieeous basally. 



Lygocerus pacificus, sp. nov. 



$ . Length 2.5'""\ Black, opaque, shagreened or closely punctate; 

 antenna; long, black, the tip of pedicel reddish-yellow; first flagellar 

 joint long, distinctly longer than the pedicel, the following Joints a 

 little shorter, about equal in length; mesopleura shagreened; wings 

 subhy aline, the stigma large, oblong, brown, the stigmal vein much 

 longer than the stigma; legs brownish-yellow, the coxjtb black; abdo- 

 men emargiuate at apex, the ventral valve and ovipositor slightly 

 prominent. 



Habitat. — Placer County, Cal. 



Type in National Museum. 



Described from a single specimen. It is the largest species I have 

 as yet seen in this genus; and its size, opaque surface, color of the 

 legs, and the shape of the stigma will at once separate it from the 

 others in our fauna. 



MEGASPILUS, Wcstw. 



Phil. Mag., I, p. 128 (1832); FGrst., Hym. Stud., ii, ]>. 97 (1856); Thorns., ofv., 1858, 



p. 287. 



EumeyaspUus Ashm. (pars) Can. Ent., xx, p. 48, 1888. 



(Type M. ahdominalls, Boh.) 



Head transverse, the occiput margined ; ocelli small, in a triangle ; 

 eyes ovate or long-oval, pubescent or hairy. 



Antennai inserted just above the clypens, 11-jointed in both sexes, 

 filiform or subfiliform, the scape long, the first flagellar joint usually 

 much lengthened, the male with simple joints, never dentate nor ramose. 



Maxillary palpi 5- jointed; labial palpi 3-jointed. 



Mandibles bifid at tips. 



Thorax ovoid, the prothorax slightly visible from above and produced 

 into a slight collar anteriorly; mesonotum slightly narrowed anteriorly, 

 with three iinj^ressed lines; scutellum longer than wide, subconvex, 

 rounded behind, with a distinct frenum; metathorax short, with acute 

 angles. 



Front wings j)ubescent, with alarge subovate stigma, truncate at apex, 

 the stigmal vein usually long and curved, the parastigma slightly de- 

 veloped. Wingless forms not uncommon. 



Abdomen ovate, subpetiolate, the ]K'tiolo sliort, stout, and strongly 

 channeled, the second segment very large, striated at base. 



Legs pilose, the i^osterior femora somewhat swollen, the last joint of 

 the posterior tarsi longer than the second. 



