112 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Tliia spwies oomes quite dose to L. G-dcntatua, but is distinguished 

 jit once from that species and all tlie otiicrs by the brevity of the 

 stigmal nervure and in bavinj;- tlie abdomen piceous basally. 



Lygocerus pacificus, sj). nov. 



9 . Lenjftb 2.5"'"'. Black, opacpie, shajTeened or closely punctate; 

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

 joint lonj;, distincrtly h)nger than tlie pedicel, the followinj^f Joints a 

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

 subhyaliue, the stigma large, oblong, brown, the stigmal vein much 

 longer than the stignm; legs brownish-yellow, the coxie black; abdo- 

 men emarginate 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, opa(jue surface, color of the 

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

 others in our fauna. 



MEGASPILUS, Westw. 



Phil, Mag., I. p. 128 (1832); rV.rst., llym. Stud., n, p. 97 (1856); Thorns., ofv., 1858, 



p. 287. 



Eumeffasjnlus Ashm. (pars) Can. Eut., xx, p. 48, 1888. 



(Type if. ahdominalis, Boh.) 



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

 eyes ovate or long-oval, pubescent or hairy. 



Antenna} inserted just above the clypeus, 11-jointed in both sexes, 

 filiform or subflliform, the scape l<mg, the first flagellar joint usually 

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



Maxillary paljii 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; mesouotum slightly narrowed anteriorly, 

 with three impressed lines; scutellum longer than wide, subconvex, 

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

 angles. 



Front wings pubescent, 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 petiole short, stout, and strongly 

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



Legs pilose, the posterior femora somewhat swollen, the last joint of 

 the posterior tarsi longer than the second. 



