128 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



Redescribed from the type series, three females and one male. 

 The type and allotype are from Washington; the two paratypes are 

 from Virginia and bear the date ''Oct. 10, 1880." 



This species is one of the most remarkable in the genus. The pecu- 

 liar structure of the mesonotum, and the great size and strange 

 shape of the abdomen are not duplicated m any of the species known 

 to me. 



15. LEPTACIS FLAVICORNIS Ashmead. 



Plate 1, fig. 11. 



Leptacis flavicornis Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 275 (female 



only). 

 Amblyaspis flavicornis (Ashmead) Bhues, Connecticut Geol. Nat. Hist. Surv. 

 Bull. No. 22, 1916 (1917), p. 533. 



Female. — Length 0.90 mm. Of the type of structure represented 

 by longiventris Ashmead; head scarcely wider than the thorax, twice 

 as wide as long, not emarginate behind; frons shining, faintly sha- 

 greened; vertex and occiput shagreened, the former bounded poste- 

 riorly by a high, sharp carina; "the antennae in the female end in a 

 4-jointed club, the joints of which, except the last, are not longer than 

 wide; the funicle is slender, the second jomt a little longer than the 

 first, the third and fourth being small"; thorax convex, three-fourths 

 as wide as long, higher than wide, scarcely longer than high; finely 

 shagreened except on pleural plates and on mesonotal knob; notauli 

 absent; mesonotum as in longiventris hut more elevated behind, the 

 knob less in evidence, its upper surface polished; scutellum as in 

 longiventris, the tubercle scarcely visible, located far down on the 

 scutellum; abdomen as long as the thorax, elliptical, one and one- 

 third times as long as wide; second tergite about as long as wide; 

 following segments short, united about half as long as the second, 

 wings tinged with brown, with short cilia. Black; antennae, except 

 the club, bright yellow; legs, except middle and posterior femora and 

 tibiae, and last joint of each tarsus, yellow; parts just made exception 

 of are dark brown in color. 



T^jpe ^ocaZ-i^y.-'-Washrngton, District of Columbia. 



Tijpe.— Cat. No. 254G0, U.S.N.M. 



Redescribed from the type specimen. The male from Florida repre- 

 sents a new species of Leptacis. It is in too poor a condition to be 

 described. 



16. LEPTACIS CYNIPSIPHILA Ashmead. 



Leptacis cynipsiphila Ashmead, Can. Ent., vol. 19, 1887, p. 129 (female only;. — 

 Cresson, Syn. N. Amer. Hym., 1887, p. 249. — Ashmead, Bull. 45, U. S. 

 Nat. Mus., 1893, p. 274., 



Female. — Length 1 .50 mm. Closely related to fiavicornis , longiven- 

 tris and glohata, with which species it forms a distinct division charac- 

 terized by the gibbous mesonotum; head wider than the thorax, dis- 



