KO. 2293. PARASITIC CHALCinOID FLIES— TIMBERLAKE. 181 



brown as in the female, the hind tibiae hardly darker; the pedicel and 

 flagellum hardly darker than the scape. Lengtli, 1.57 to 1.98 mm. 



The following material has been examined: One female (type), 

 Washington City (W. H. Ashmead); two females reared from 

 material of Porthetria disbar (Linnaeus), Massachusetts, November, 

 1894 (C. H. Fernald); one female, Forest Hills, Massachusetts, July, 

 1911 (C. T. Brues); nine females, six males, reared from CJirysopa 

 cocoons, Murray and Salt Lake City, Utah, September 2-18, 1913 

 (P. H. Timberlake); one female, one male, reared from a Chrysopa 

 cocoon, Sacramento, California, August 24, 1912, California State 

 Insectary No. 25; one female reared from material of CMlocorus 

 similis, Rossi, Island of Formosa, 1916 (C. P. Clausen) ; and one female 

 reared from a Hemerobiid, Duarte, California, September 12, 1916 

 (J. R. Horton), Horton's No. 38. 



Type.— Cat. No. 4747, U.S.N.M. 



2. ISODROMUS ICERYAE Howard. 



Plate 40, fig. 15. 



liodromus iceryae Howard, Rep. Ent., U. S. Dept. Agric, for 1886, 1887, p. 488, 



pi. 3, fig. 1. 

 Isodrovius pulcher Girault, Descriptiones Stellaruni Novariim, Washington, D. 



C, May, 1917, p. 16. 

 Parataneostigma nigriaxillae Girault, Annals. Ent. Soc. Amer., vol. 8, Oct., 1915, 



p. 275. 



Female. — Head a little thicker than in niger, the planes of the 

 frontovertex and face meeting in an angle of but little more than 90°; 

 frontovertex about two and one-half times longer than wide, the 

 dorsal orbits of eyes parallel; ocelli very nearly in an equilateral 

 triangle, the posterior pair about one-fourth of their own diameter 

 from the eye margins, the median ocellus considerably behind the 

 middle of the frontovertex; antennal sockets farther apart than in 

 niger, the distance between them being about one and a half times 

 their length, their inner rims nearly parallel; scrobes distinct and 

 reaching above a line drawn between the lower corners ot the eyes. 

 Antennae rather shorter than in niger, the scape practically the same, 

 the pedicel longer or equal to a little more than the first two funicle 

 joints combined; all the funicle joints wider than long, increasing 

 gradually in width distad, the first joint somewhat smaller than the 

 second and about one-half as wide as the sixth, which is twice as wide 

 as long; club without trace of segmentation, obliquely truncate nearly 

 to the base, and as long as the last fom* funicle joints combined. 

 Mandibles with three short, equal teeth, the lower two acute, the 

 upper one blunt. Axillae but slightly elevated above the scutellum; 

 the latter rather flat on the basal half, but more sloping towards the 

 sides and apex, the base with a trace of a median impressed line. 

 Wings broad, the basal area with a row of dark-colored cilia next to 



