1908] GIRAULT — NORTH AMERICAN CHALCIDOIDEA 119 



however, with a dusky ring around the middle and a less distinct one near its apical 

 end. 



Antennae varicolored; basal half of scape, the two apical funicle joints, and the 

 apical joint of club silvery white, with a tinge of yellowish. Apical half of scape, 

 the pedicel and funicle dusky; apical joint of club and funicle 2, more dusky than 

 the silvery white funicle 3; scape slender, reaching to apex of vertex, much longer 

 than the three following joints; pedicel at least one-half longer and also broader 

 than funicle joint 1, cylindrical, tapering caudad; funicle 1 and 2 subequal in length, 

 funicle 2 slightly longer and broader; funicle 3 one-third longer and broader than 

 funicle 2, broader than the pedicel, and subequal in width to the first joint of the 

 club; three club joints gradually tapering, the basal the broadest, subequal in length 

 to club 2, the second slightly narrower and the third, or apical joint, conical, but 

 nearly as long as the others, and abruptly paler. 



Flagellum uniformly moderately hairy with white hairs. 



(From 5 specimens, killed 24 hours after emergence. §-inch objective, Bausch 

 & Lomb). 



Male: — Unknown. Nearest to ProsfaUeUa murtfeldtii Howard, but differing 

 in antennal structures, coloration, especially in the color of the abdomen, the presence 

 of the dense cilia on the discal surfaces of the hind wings, the carinated vertex, and 

 in sculpture; also somewhat similar to macidata Howard in general appearance, but 

 with the characteristics entirely distinct. 



Seen with the naked eye, the species is very dark; through a lens (Coddington, 

 i inch) the head and thorax are pale cadmium yellow, the thorax with whitish or 

 paler markings and a distinct median line caudad of the mesoscutum; the abdomen 

 appears black, with a distinct silvery or milky white tip, and transverse fascia of the 

 same color across the basal third; the legs and antennae banded, and the distal half 

 of the wings distinctly dusky or clouded, and the base less distinctly so. Seen from 

 the side there is a more or less distinct continuous stripe of silvery white along the 

 thorax and abdomen. 



This beautiful species was first reared by Mr. James A. West of this office, in 

 July, 1907, when a single female issued from twigs of fruit trees infested with the San 

 Jose scale, Aspidiotus perniciosus Comstock, obtained at Urbana, Illinois; apparently 

 other hosts were not present. Subsequently reared by myself, in the insectary of this 

 office, from apple twigs infested with Chionaspis furfura Fitch, obtained at Urbana, 

 Illinois, on April 3, 1908. Females only were reared. 



I have since been informed by Dr. L. O. Howard {In litt., Nov. 23, 1908) that 

 the thirteen specimens of Prospaltella reared from new species of Aspidiotus, by 



