t 
rower than pedicel, broader than long, considerably larger than joint 1. 
Joint 3 longer than 1 and 2 together and broader than long. Club very 
broad at base, 3-jointed, acuminate at tip, broadest portion near end of 
first joint. Joint 3 longest, joint 1 next, joint 2 shortest. Head with 
sparse but very noticeable stout hairs. Hyes naked. General color 
deep black, with slight metallic reflections on dorsum of thorax. See- 
ond abdominal segment yellow, but when abdomen is bent upward or 
shrunken this color is hidden. Antennal scape black; remaining 
joints yellowish brown; tarsi yellowish; last joint dark brown or black. 
Femora and tibive dark brown, except front tibizv, which are lighter. 
Entire abdomen sometimes light brown, particularly with male, the 
venter being lighter than dorsum. Mouth-parts honey yellow or light 
brown, with a honey-yellow band on prosternum at insertion of front 
coxie. Wing veins black, very distinct, forewings with a large dusky 
patch below submarginal vein. 
Described from many male and female specimens. ‘Types were reared 
in this office from specimens of Aleyrodes collected by Professor Com- 
stock on Jris at Los Angeles, Cal., and from an Aleyrodes on Fuchsia 
collected in the same locality by Alex. Craw in 1879. <A large series of 
the same species was also bred by Mr. Coquillett eight years later at 
Los Angeles, Cal., from the same Aleyrodes on Fuchsia (October 4); 
from an Aleyrodes on Sonchus (September 16-21); and from another 
species of the same genus on willow (September 17), as well as from 
an Aleyrodes on Sambucus (October 21). Another series of nine speci- 
“mens was reared by Mr. T. D. A. Cockerell from Aleyrodes on Aquilegia 
at Las Cruces, N. Mex., November 20, 1894; and a single male of what 
may be the same species was also reared by Mr. Cockerell from an A ley- 
rodes at Kingston, Jamaica. 
Genus MESIDIA Foerster. 
Mesidia Foerster. Hymenopterologische Studien, Heft. 11, p. 30, 1856. 
This genus is unknown to me. <A very brief characterization, how- 
ever, Which Foerster gives distinguishes it well from all other genera. 
The forewings have the oblique hairless line, and the three joints before 
the club of the antennie are of equal length. It is said to be inter- 
mediate in its characters between Coccophagus and Aphelinus. 
Genus CENTRODORA Foerster. 
Centrodora Foerster. Kleine Monographien, 1878, pp. 66, 67. 
This genus is also unknown to me. The head is as broad as the 
thorax, the antenne 6-jointed, scape of male broad; with the female 
the pedicel is of the usual form, with two ring joints following, of which 
the first is smaller than the second. The third funicle joint is some- 
what longer than the pedicel, and the fourth is very long, but not as 
