1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 657 



5. Radius distinctly present g 



Radius wholly wanting (; (s) p araUp8i8i F »,. 8ti 



6. Wings with no cubital transverse vein - 



Wings with a cubital transverse vein G. (9) Lysiphlebus Forst. 



7. Wings with no hind middle humeral cell _ g # 



Wings with a hind middle humeral cell a. (10) Did reins Forst. 



8. Fore middle humeral cell closed ; metathorax not areolated 9, 



Fore middle humeral cell open ; metathorax areolated. 



Female with horn-like appendages on the tip of the abdomeu ; postmarginal 

 branch shorter than the marginal branch in both sexes. G. (11) Trioxys Hal. 



Female with no hornlike appendages on the tip of the abdomen; male with 

 a postmarginal which is longer than the marginal branch ; radius 

 much elongated G. (12) Lipohxi* Forst . 



9. Female with no horn on the tip of the abdomeu G. (13) Adialytua Ft'irst. 



PRAON Haliday. 

 (Apluclaria Prov., Add. Faun. Hym., p. 152, November, 1886.) 

 Praon humulaphidis n. sp. 



Length, about- 3 mm . Smooth, polished, bright yellow-ferruginous ; 

 vertex of head brown ; ocelli, eyes, antennas, except the two basal joints 

 and base of 3d joint, mesonotum, and scutellum, black ; metascutelluin 

 convex, brown. 



The parapsidal grooves are distinct, sharply defined, converging and 

 almost meeting just in front of the scutellum; metathorax smooth, 

 rounded; the scutellum smooth, with a deep transverse fovea at base; 

 wings, hyaline ; veins, pale brown. 



Habitat. — Richfield Springs, New York. 



Described from one broken specimen, labeled ISTo. 4123°, reared June 

 15, 1887, from a hop Aphis, Siphonophora sp. 



I should have refrained from describing this species but for its being 

 a reared specimen with such striking colors that its identification, even 

 from the poor description, can easily be made. 



Praon virginiensis n. sp. 



Male. — Length, 2f mm . Smooth, polished; the head, antennas, except 

 two basil joints, and mesonotum, black ; clypeus, lower portion of 

 cheeks, mandibles, collar, pleura, metathorax, abdomen, and legs, yel- 

 low-ferruginous. The parapsidal grooves are distinct as in previous 

 species, the scutellum is similar ; but the metathorax is smooth, with a 

 delicate medial carina; abdomen long lanceolate, longer than the head 

 and thorax together, the disk obfuscated; the petiole is a little longer 

 than wide, with delicate lateral grooves and faint medial keel. Wings, 

 hyaline; veins, brown. 



Habitat. — Arlington, Virginia. 



Described from a single specimen that had the antenna 1 broken off 

 at tips. 



Proc. X. M. 88 12 S^-lfcttg^ 



