62 PROC. ENT. SOC. WASH., VOL. 22, NO. 4, APRIL, 1920 



hairs; second tergite oblong-oval, truncate, and higher at the base than the 

 petiole, two-thirds the length of the entire abdomen; third and fourth ter- 

 gites equally long, the third the widest; fifth tergite pointed, slightly trans- 

 verse, with a brush of bristles at the apex, and a small, transverse fovea 

 sub-apically. Black; antennae, except last four joints and half of the eighth, 

 palpi, and legs brownish yellow; mandibles rufous; pubescence white. 



Male. Length 1.2 mm. Differs from the female in several minor particu- 

 lars; the scutellar fovea is much deeper and wider; the propodeal projection 

 is less prominent; the antennae are long, verticillate, and composed of four- 

 teen joints; pedicel ovate, shorter, but wider than the third joint; third joint 

 slender, pediculate at the base; fourth strongly curved, pediculate basally, 

 its distal margin oblique and joined to the fifth at its inner apical angle; 

 funicular joints 5-13 nodose, verticillate, pediculate basally, subequal in 

 length and width; penultimate joint ovate, a little shorter than the twelfth, 

 and a little shorter but distinctly larger than the fourteenth, which is slender 

 and conical. 



Type locality. Williamsport, Maryland. 

 Type. Cat. No. 22794, U. S. N. M. 



Eleven specimens, ten females and one male, from Williamsport, 

 Maryland, reared by Mr. H. L. Parker, October 7, 1916, from a 

 Dipterous pupa, and recorded in the Bureau of Entomology 

 under Accession No. 14554. Two paratypes retained by the 

 author. 



Trichopria marylandica, new species. 



Differs from all the forms at present described from North 

 America in having the last four funicle joints broadly transverse 

 and the penultimate joint of the club as long as the terminal 

 joint of the antennae. 



Female. Length 1.25 mm. Head transverse, the very prominent frontal 

 ridge causing it to appear globose; shining and impunctate; not very full 

 behind the eyes, viewed from in front nearly circular, slightly pointed at the 

 mouth; frontal ridge prominent, thin and transparent, pointed medially at 

 the apex, the deep depression behind divided by a median carina ; face below 

 ledge flat and smooth; clypeus truncate apically, rounded posteriorly, the 

 lateral angles sharp but inconspicuous; ocelli arranged in a low triangle, very 

 distant from the eyes; vertex rounded; occiput margined; antennae stout, 

 longer than the head and thorax combined; scape stout, extending beyond 

 the ocelli, concave below, as long as the next five joints combined; pedicel 

 cylindrical, a little longer than the third joint, longer than wide, slightly 

 narrower than the scape; third antennal joint conical, as wide at the apex 

 as the pedicel; fourth joint quadrate, a little shorter and narrower than the 

 third, subequal to the fifth; sixth, seventh, and eighth funicle joints, wider, 



