21 
nine, and its extraordinary wing markings, as well as the peculiar for- 
mation of the notal sclerites behind the mesoscutellum distinguish it 
widely from hitherto described genera. The type described by the 
writer as Aphelinus pulchellus in the Annual report of the Department 
of Agriculture for 1880 is known froma single female specimen only, 
which was reared from a common Asterolecanium on linden in the Dis- 
trict of Columbia. Upon this single specimen I did not care to erect 
anew genus. Recently, however, several specimens of an allied though 
congeneri¢c species have been reared from Coccid sent in by Mr. ©. H. 
Tyler Townsend from Guadalajara, Mexico. One specimen he reared 
himself some three years ago from a Ceroplastes, another specimen we 
have reared from Pseudococcus yucce collected by Mr. Townsend on 
Pelargonium at Aguas Calientes, Mexico, and three other specimens 
have been reared from specimens of Lecanium hesperidum collected by 
Mr. Townsend on lime at San Luis, Mexico. 
ANALYSIS OF THE SPECIES OF PERISSOPTERUS. 
General color white, tinged in spots with dark, reddish orange, dotted with 
| CNENELES 5 ee cs es eae On es le ee Ts pulchellus 
General color light crange-yellow, dotted with black, no admixture of reddish or 
WHMIS SS coe ce Seat a re ee MexiCanus 
(The specific differences between the two species in the wings, as shown in the 
figure, will enable the readiest recognition of the species.) 
Perissopterus pulchellus (Howard) (figs. 5a and 6). 
Aphelinus pulchellus Howard. Report of the Entomologist, Annual Report 
Dept. Agric. 1880, p. 356. 
Female.—Length, 1 mm.; expanse, 2.2 mm.; greatest width of fore- 
wings, 0.41 mm. (For some unexplained reason the measurements 
given in the original description are erroneous. Those just given were 
taken recently from the type.) Head and thorax quite uniformly but 
finely punctate; mesoscutellum more coarsely than other parts. Head 
and thorax white, tinged in spots with orange, except at sides of meta- 
thorax, which are blackish; propleura white; mesopleura blackish; 
mesosternum brown; eyes bluish white; antennal scape white, with a 
longitudinal narrow black stripe below; pedicel white, with a black 
Stripe below, dark brown at base above. Joints 1 and 2 of funicle 
dark brown; joint 3 white, with a dark brown patch at base and above. 
Club with basal two-thirds dark brown, yellow at tip; two large brown 
spots on lower side of cheeks; face and vertex white; hairs on vertex 
brown, ocelli reddish. All legs white; femora spotted with black, tibize 
banded with black. Hind cox dusky, middle and fore cox white; 
each tibia with three equidistant black bands. First, second, and 
fifth tarsal joints black; third and fourth yellowish; middle tibial spur 
jet black. Abdomen yellowish, brown above, darker in middle, some- 
imes black; sides white, with irregular subcircular black markings; 
ovipositor black; wings hyaline, with an irregular pattern of open net- 
