15 
mesonotum bright shining green, the scutum somewhat more brilliant than the scu- 
tellum; metanotum and abdomen shining black, with a dark green luster; all cox 
and femora dark green, honey-yellow at tips; front: tibia honey-yellow, greenish at 
base; middle tibiw entirely honey-yellow, sometimes with a slight green spot near 
base; hind tibixw green, honey-yellow at either end; front and hind tarsi brownish; 
middle tarsi yellow. 
Male.—Length, 1™™; wing expanse, 2.5™™; greatest width of fore wing, 0.5™™- 
Differs from @ chiefly in the antennw. The flagellum is much flattened; scape still 
shorter than in 9; pedicel very short and insignificant; joint 1 of the funicle twice 
as long as wide, and three times as long as pedicel; joints 2, 3, and 4 are fang-shaped 
dorsally ; joint 3 more acute than 2-or 4; joints 5 and 6 resemble joint 1 in size and 
proportions; club short and suboval. Abdomen short and subcordate in form. 
Described from 4 2’s and 2 4’s bred, November 7, 1881, from the 
galls of the Psyllid Trioza diospyri (Ashmead), on the Persimmon (Dios- 
pyros virginiana) on the Department grounds at Washington. 
This species is markedly different from Hncyrtus trioze André, bred 
by M. Ed. André from Trioza centranthi Vallot, and described in Ann. 
Soc. Ent. France, 1878, p. 84; but belongs to the same group of the 
genus Hneyrtus as H. strobili (L.), to which it is quite closely related. 
Ei. strobili, however, preys upon certain gall-making Cecidomyids, as 
Cec. rosaria and CO. salicina. 
A single Encyrtus issued from a single Trioza in every case, making 
its way through the dorsum of the abdomen of its host. [Dept. Agr. 
and C. V. R. Coll.] 
23. (7) Encyrius solus, n. sp. 
This species also belongs to the groupof H. strobili (L.), and does not 
differ structurally from HL. trioziphagus to amaterial extent. In size and 
coloration it does differ quite markedly. 
Female.—Length, 2™™; wing expanse, 4.2™™; greatest width of fore wing, 0.7™™. 
Mesonotum somewhat more deeply shagreened than with trioziphagus. Color: The 
basal portion of each antennal joint brown, distal portion honey-yellow; face black, 
with a faint bluish tinge ; mesonotum black, faintly greenish ; abdomen shiny black. 
All legs entirely yellow, except hind cox, which are black, with a greenish luster. 
Described from 1 2 specimen bred, March 14, 1879, from the gall of 
Trioza magnolice (Ashmead), on Persea carolinense (Red Bay), collected at 
Gainesville, Fla. Its habits appear to be the same as those of the pre- 
ceding species. [C. V. R. Coll.] 
24. (8) Encyrtus pachypsylle, n. sp. 
This species is closely related to . trioziphagus. The minute spines at the distal 
end of the posterior tibia, opposite the tibial spur, are longer and more curved than 
with trioziphagus. The coloration differs in that with pachypsylle the tibiew and tarsi 
are all light honey-yellow, and the flagellum of the ¢ antenna is light brown. The 
$ antenna also differs from that of trioziphagus in that joints 1,2, and 3 of the fu- 
nicle are fang-shaped instead of 2, 3, and 4. The dimensions on the average are the 
same in both species, although pachypsylle is quite variable in the 9. 
Described from many éand@specimens bred, between May 5 and 
10, 1884, from galls of Pachypsylla celtidis-gemma Riley, collected in 
Southern Maryland. [Dept. Agr. and C. V. R. Coll.] 
