26 
Subfamily ELACHISTLOE. 
The two genera mentioned under this subfamily may be separated as 
follows : 
A. Posterior tibiae with two spurs Euplectrus. 
B. Posterior tibite one-spurred , Elachistus. 
Genus Euplectrus Westwood. 
Head triangular ; eyes prominent. Antenine inserted below middle of face ; scape 
long ; funicle 4-jointed. Thorax highly developed ; mesouotum with a median 
longitudinal carina. Abdomen with a moderate, cylindrical petiole. Posterior tibiae 
with two very long spurs. Body not metallic, but of dark color ; head and thorax 
with sparse, coarse hairs. 
43. (1) Euplectrus comstockii Howard. 
Male. — Length, 1.9& n,m ; wing expanse, 4.3 mm ; greatest width of fore wing, O.B m ™. 
F.ice triangular, narrowing sharply below eyes, smooth and glistening, with a very 
few punctures; antennal scape slender, not widened. Pronotum very rugose, except 
at posterior border ; mesoscutum somewhat transversely rugose, with a strongly- 
marked median longitudiual carina; mesoscutellum smooth; metathoracic carina 
very pronounced and dividing posteriorly ; metatibial spine nearly as long as first 
two tarsal joints. Abdomen broadening from base and subtrnncate at tip. Gen- 
eral color shining black with long stiff whitish hairs scattered over thorax; labrum 
honey-yellow; antennal scape light hoiey yellow, flagellum gradually darker, club 
quite dark sit tip; all legs honey-yellow ; abdomen with a dorsal yellow spot entirely 
bounded with black and of an irregular pyramidal shape, the base of the pyramid 
towards tip of abdomen ; venter yellow-brown along median line 
Female. — Slightly larger : abdomen more nearly orate. 
Described from many $ 9 specimens bred from half-grown larvae of 
Aletia xylina (Say) in Mississippi, Alabama, and Florida. [0. V. R. 
and Dept. Agr. Coll.] 
(See Report Department of Agriculture, 1880, Plate II, Fig. 1. See 
also Can. Ent., XII, p. 159, and Am. Naturalist, 1881, p. 16.) 
44. (2) Euplectrus leucotrophis, n. sp. 
Male. — Length, 1.25 mm ; wing expanse, 2. 91 mm ; greatest width of fore wing, 0.58 mm . 
Differs from E. comstockii in the following points : Mesoscutum very rugose ; median 
carina scarcely visible; face, below eyes, and scape of antennae nearly white, slightly 
yellowish; all legs, including cox?e, semi-transparent, whitish in color; the dorsal 
abdominal yellow spot extends to pedicel, and at its base widens out to include the 
lateral borders of the abdomen; the venter is yellowish near base ; elsewhere dark 
brown, nearly hlack. 
Described from 3 $ specimens bred from unknown Arctiid larva, July 
19, 1880, received from Dr. R. S. Turner, Fort George, Fla. TDept. Agr. 
Coll.] 
45. (3) Euplectrus platyhypeuae, n. sp. 
Female. — Length, 1.67 mm ; wing expanse, 3.8 mm ; greatest width of fore wing, 0.6 mM - 
Differs from E. comstockii as follows: Pronotum markedly shagreened ; mesoscu- 
tum only slightly roughened ; median carina distinctly visible; hind border of abdo- 
men well rounded. Color: Face entirely black ; legs dark honey-yellow ; hind coxae 
