380 PROCEEDINGS OP THE NATIONAL MUSEUM vol. 83 



pale ferruginous; scape greenish; thorax violaceous to blue, anterior 

 portion of pro thorax blackish; abdomen black with a strong blue- 

 green reflection and with a strong violaceous reflection beneath; legs 

 (outer faces at least) more or less concolorous with thorax, anterior 

 tibiae testaceous to brownish, sometimes with a violaceous stripe 

 above, tarsi straw color to testaceous; wings hyaline, veins testaceous. 



Type— U.S.N.M. no. 49778. 



Type locality. — Cadet, Mo. 



Remarks. — Described from type and one female paratype. The 

 latter is in the American Museum of Natural History; it is from 

 Swannanoa Valley, N. C. (June). The type was taken by J. G. Barlow, 

 June 19, 1889. 



PERILAMPUS HYALINUS Say 



Perilampus hyalinus Say, Contr. Maclurian Lye. Arts and Sci. Philadelphia, 

 vol. 1, p. 79, 1829. — LeConte, The complete writings of Thomas Say on the 

 entomology of North America, vol. 1, p. 382, 1859. — Viereck, Connecticut 

 State Geol. Nat. Hist. Surv. Bull. 22, p. 524, 1916. 



? Perilampus hyalinus Provancher, Nat. Can., vol. 12, p. 293, 1881; Petite faune 

 entomologique du Canada et particulierement de la province de Qu6bec, 

 vol. 2, Hymen., p. 572, 1883. 



IPerilampus aciculatus Provancher, Additions et corrections au volume ii de 

 la Faune entomologique du Canada traitant des Hym^noptercs, p. 199, 1887. 



Female. — Length about 2-5.5 nmi. Head: Frons with a prominent 

 carina extending from behind the anterior ocellus downward on each 

 side of the scrobal cavity to level of insertion of antennae and beyond, 

 its lower portion nearly straight or at least not very sharply curved, 

 approaching eye margin gradually; frons laterad of carina with longi- 

 tudinal rugae and ocellocular area with transverse rugae, the former 

 area rarely smooth and in rare instances again marked with irregular 

 ridges and coarse punctures, resembling the condition in regalis; 

 emargination of frontovertex extending back between lateral ocelli, 

 in some specimens almost touching a line tangent to posterior margins 

 of same, anterior margin of anterior ocellus as a rule not much in 

 front of anterior margins of lateral ocelli; postocellar line three to 

 four times (sometimes more) the length of median line of vertex 

 and distinctly longer than ocellocular line, often about twice as 

 long; eyes without a smooth area along posterior orbit (striations 

 often faint) or with such area narrow; cheeks and face on each side 

 of clypeus with rather coarse rugae, the lowermost rugae on face 

 commingling with or continuous with those on cheeks, the rugae on 

 cheeks as a rule rather dense and numerous; malar furrow absent 

 although rarely faintly indicated; scrobal cavity fairly deep, its sides 

 beginning to flare considerably above level of base of scape, especi- 

 ally in the smaller specimens; hyperclypeal area, in relation to face, 

 usually not greatly, sometimes not at all, depressed; clj'^peus wider 

 than long (rarely almost as long as wide), somewhat longer than 



