384 PKOCEEDINGS OF THE NATIONAL MUSEUM vol. 83 



turning caiidad medially; outer portion of mediolateral areas of 

 propodeum as a rule not depressed although sometimes marked with 

 coarse rugae, as a rule not differing materially from greater part of 

 surface; postmarginal vein occupjdng about one-sixth or less than 

 one-sixth the distance between end of marginal vein and apex of wing 

 in a straight line, about one-half to nearly two-thirds the length of 

 marginal vein^; wing hairs fairly or quite dense and usually dark, 

 rarely rather pale. 



Abdomen: Posterior face wider than long, sometim.es about as long 

 as wide; first tergite strongly transverse and more or less sculptured, 

 its anterior margin not, or rarely, slightly elevated and as a rule more 

 or less distinctly emarginate; tliird segment (second of the gaster) 

 concealed or only slightly exposed. 



Color: Black; flagellum of antenna grayish dull dark brown to 

 grayish reddish brown with apical portion paler, the paler color 

 usually more extensive on underside and in some specimens taking 

 in the whole of the underside; scape as a rule bluish or greenish; legs 

 brown to blackish brown; coxae usually black; posterior femora as 

 a rule bluish or greenish, anterior and intermediate femora also some- 

 times greenish or bluish; posterior and intermediate tibiae apically 

 and anterior tibiae, except a stripe at base above, pale testaceous to 

 brownish, the basal portion of posterior pair sometimes with a bluish 

 or greenish tinge ; in males all tibiae sometimes completely testaceous ; 

 tarsi straw color to testaceous or brownish testaceous; wings hyaline, 

 veins dull yellowish to brownish, sometimes reddish basally, 



Alale. — Length about 2,25-3 mm. Essentially the same as the 

 female; scape slender, the portion bearing sensorial punctures not 

 very greatly broadened at apex and comprising nearly the whole 

 length of the scape, sensoria fine to moderately coarse and dense. 



Type. — Evidently lost. Kedescribed from 12 females and 9 males. 



Distribution. — Massachusetts (July); New Jersey (July); Pennsyl- 

 vania; Maryland (July, Sept.); District of Columbia; Virginia (May, 

 Aug., Sept.); Illinois. Say described the species from Indiana. 



The species has been reared from a pupa of Melittia, but very 

 likely it was hyperparasitic. 



PEUILAMPUS CRAWFORDI. new species 



Female. — Length about 2.5-3 mm. Head: Frons with a carina 

 extending from behind the anterior ocellus downward on each side 

 of the scrobal cavity to beyond the level of the insertion of the 

 antennae, this carina prominent or fairly prominent; frons laterad 

 of carina and ocellocular area usually in part faintly shagreened 

 (sometimes more distinct in males); emargination of fronto vertex 

 narrowly arcuate and slowly widening downward; the distance 



» The posterior limit of the postmarginal vein is often rather difficult to make out, the vein merging with 

 the costal border of the wing. 



