27 
behind the eyes. Femora and tibie fuscous; tarsi nearly white; wing 
veins fuscous. Abdominal segments 1 to 5 each with a dusky trans- 
verse dorsal band interrupted toward the middle; abdomen subovate, 
somewhat truncate at tip; ovipositor slightly exserted. 
Male.—Unknown. 
Described from twelve female specimens reared from Diaspis rose 
from Fort George, Fla., and the same species collected at Santa Bar- 
bara, Cal., and from the same species collected in the District of Colum- 
bia. All specimens were reared in February. Professor Riley reared 
nine females from a Mytilaspis on an orchid, an undetermined species of 
Dycaste from Japan, received February 6, 1874, from Mr. George Thur- 
ber, of The American Agriculturist. 
Aphelinus fuscipennis Howard. 
Aphelinus fuscipennis Howard. Annual Rep. Dept. Agric., 1880, p. 356. 
Female.—Length, 0.6 mm.; expanse, 1.3 mm.; greatest width of fore- 
wing, 0.2 mm. Closely resembles A. diaspidis, the differences, aside 
from its smaller size and the more pronounced infuscation of the wing, 
being purely colorational. General color, dull honey yellow; antennz 
fuscous, almost black at tip; eyes blackish; ocelli dark crimson; a dis- 
tinct transverse black band on the occiput behind the eyes; the scutel- 
lum dusky at tip; abdomen with five dusky lateral transverse bands; 
legs and wing veins honey yellow; fore-wings with an indefinite fus- 
cous patch below stigma and another well-defined, darker, somewhat 
crescent-shaped streak near the base, bounded by the basal clear space. 
Male.—Closely resembles the female, but is slenderer and in general 
darker in color. 
Described from many female specimens and comparatively few males, 
reared from Aspidiotus perniciosus at San Jose, Cal.; Los Angeles, Cal.; 
San Francisco, Cal.; New Brunswick, N. J., and Riverside, Md.; from 
Chionaspis euonymi from Fort George, Fla.; from Mytilaspis gloverti in 
hothouses in the District of Columbia, and from Mytilaspis pomorum on 
horse-chestnut in the District of Columbia. Professor Berlese has 
reared this species in Italy from an Aspidiotus on Acacia longifolia. 
Genus PLASTOCHARIS Foerster. 
Plastocharis Foerster. Hymenopterologische Studien, Heft. 1, 145, 1856. 
Tryphasius Foerster. Loc. cit., 83. 
Thysanus Walker. Ann. Nat. Hist., 1839, p. 234. (Changed by Foerster on 
account of preoccupation. ) 
The best description of this genus is given by Foerster in his Kleine 
Monographien, page 68. It is not known to occur in this country. 
The male antenne have one ring joint and a very long flagellar club. 
The female antenne have three ring joints and a shorter club. The 
middle tibiz have a long spur and the tarsi are 5-jointed. The base of 
