GENERA OF THE ENCYRTIN^.-ASHMEAD. 379 



3. ISODROMQS NIGER Ashmead, new species. 



Female.— h&wgVa, 2 inin. Robust, black; the scape and flagelkmi 

 beneath sbrehvownish; the protboracic scale margined with white; the 

 teguliE white at base; the front legs and the middle femora and tarsi, 

 except the basal joint, honey-yellow; middle tibiir and the hind legs, 

 except the tarsi, brown-black; hind tarsi, basal joint of middle tarsi, 

 and the tibial spnrs, white. Wings clear hyaline. 



Tyjje —Oat. No. 4747, U.S.N.M. ( Ashmead collection.) 

 Habitat. — District of Columbia. Captured wliile ovipositing in an 

 immature Chrysopid larva. > 



4. ISODROMUS ATRIVENTRIS Ashmead, new species. 



Female. — Length, 2 mm. Ferruginous; the hind tibise and tarsi, 

 the last four joints of the middle tarsi, and the tlagellum are brown or 

 fuscous; the disk of mesonotum is obfuscated ; the metanotum and the 

 abdomen are black; the tegulie at base white, while the metapleura 

 are clothed with a silvery pubescence. Front wings hyaline, with a 

 large discoidal cloud beneath, and inclosing the stigmal vein. 



Tyi?e.— Cat. No. 4748, U.S.N.M. (Ashmead collection.) 



Habitat. — Canada: Ottawa. (W. H. Harrington.) 



5. ISODROMUS PUNCTICEPS Howard. 



Eiicyrtus puncUceps Howard, Bull. No. 5,11. S. Dept. Ag-ric, Div. Ent., 1885, p. 

 14. — Cresson, Syn. Hym.N. A., 1887, p. 239.— Dalla Torre, Cat. Hyni., V, 

 1898, p. 262. 



Type.— Cat. No. 2635, U.8.N.M. 

 Habitat. — Virginia. 



54. CERCHYSIUS Westwood. 



1832. Cerchysius Wkstwood, Phil. Mag. (3), I, p. 128. 



1884. Aseirha Cameron, Biol. Centr.-Am. Hym., I, p. 127 (teste Howard). 



{Tyipe, Encyrtus subjjlanus Dalman.) 

 I. CERCHYSIUS CAUDATA Cameron. 



Aseirha caudala Cameron, Biol. Ceiitr.-Ani. Hym., I, 1889, p. 127, female, pi. vi, 



fig. 13. 

 Cerchysius caudafa Howard, Jouru. Linn. Soc. Lond. Zool., XXV, 1894, p. 87. 

 Aseirha caudata Dalla Torre, Cat. Hym., V, 1898, p. 244. 

 Habitat. — Guatemala. 



2. CERCHYSIUS ELASMOCERI Ashmead, new species. 



Female. — Length, 1.6 mm.; to tip of ovipositor, 2 mm. Robust, black 

 with a faint bluish tinge, smooth iinpunctate except the frons, which 

 is faintly shagreened. Antenna^ black, the tlagellum snbfiliform, only 

 slightly thickened toward apex, very little more than twice the length 

 of the scape; funicle Joints cylindrical, more than thrice longer than 

 thick; pedicel obconical, shorter than the first funicle joint, with a 



