NEW CHALCIDOIDEA—GAHAN 45 
Female and male.—Both sexes differ from discreta in the follow- 
ing particulars: The ocellocular line is less than half as long as the 
longest diameter of a lateral ocellus. The vertex is a little less 
strongly sculptured and when viewed from directly above seems to 
have a low but distinct ridge originating at the dorsal margin of the 
median ocellus and running laterad in front of each lateral ocellus 
nearly to the eye margin, where it curves downward along the inner 
orbit. (No such ridge is apparent in discreta.) The slightly ele- 
vated area is present on the scutellum but in this species is very finely 
sculptured. The femoral depression on the mesopleuron is not trans- 
versely striated but smooth. The propodeum is divided by coarse 
carinae or rugae into about 25 more or less distinct areas, the median 
one of which is ovate or elliptical in shape and extends from the base 
to the apex of the propodeum, while the others are irregular in shape 
and roughly arranged in series of three between the base and the apex 
of the propodeum. The stigmal vein is not completely sessile but very 
shortly petiolate. The color is very similar to that of discreta. 
Anterior coxae black, middle pair almost entirely, and posterior 
pair beneath reddish testaceous; trochanters testaceous; anterior and 
middle femora blackish with their apices pale yellowish; hind femur 
mostly black with the base broadly testaceous and a large pale-yellow 
spot at apex; anterior and middle tibiae yellow at bases and apices, 
dark testaceous to blackish in the middle; posterior tibia black at 
extreme base, with a large yellow spot near base and another at apex, 
the rest reddish testaceous; tarsi testaceous; forewings very faintly 
tinged with fuscous; abdomen of female reddish beneath, of male 
entirely black. In all other respects agreeing with description of 
discreta. 
Type locality —¥ rijoles, Panama Canal Zone. 
Type.—uvU.S.N.M. No. 55150. 
Remarks.—Described from 15 females and 13 males reared in De- 
cember 1923 by Wheeler and Zetek under Zetek No. 2352 from a nest 
of T'rigona amalthea (Olivier), which was infested by an unidentified 
moth. 
Family PTEROMALIDAE 
Genus DIBRACHYS Foerster 
DIBRACHYS CAVUS (Walker) 
Pteromalus cavus WALKER, Ent. Mag., vol. 2, p. 477, 18385. 
Dibrachys cavus (Walker) Kurpsumov, Rev. Russe Ent., vol. 13, p. 11, 1913.— 
GAHAN, Proe. Ent. Soc. Washington, vol, 30, p. 211, 1938. 
Trichomalus trujilloi BLANCHARD, Rey. Chilean Hist. Nat., vol. 41, p. 178, 1937 
(1938). (New synonymy.) 
To the already long list of synonyms of this widely distributed 
species, as set forth by Kurdjumov in 1913 and amplified by Gahan in 
