122 PROC. EXT. SOC. WASH., VOL. 21, NO. 6, JUNE, 1919 



Dendrocerus conwentziae, new species. 



Closely related to D. californicus Kieffer but apparently differs 

 from the description of that species, which is based on a male, 

 by having the fifth flagellar joint, as well as the first to fourth, 

 distinctly three-cornered and hairy, their apices arcuately emar- 

 ginate and produced into a short neck to which the following 

 joint is attached; sixth joint also slightly serrate; all flagellar 

 joints distinctly longer than the apex is broad. 



Female. Length 2 mm. Uniformly dull black except the front legs, which 

 are very dark brown; mandibles brownish; wings subhyaline, more or less 

 stained with fuscous, the fuscous staining most apparent just behind the 

 stigma and in the area between the stigmal vein and the anterior wing margin. 

 Head finely closely punctate and opaque; viewed from above transverse . 

 the occiput slightly concave and distinctly margined; ocelli in an obtuse 

 triangle, the lateral ocelli a little more distant from the eye-margin than the 

 diameter of an ocellus, postocellar line fully twice the ocellocular; vertex 

 behind the ocelli with a very faint median longitudinal line connecting with 

 the occipital carina; viewed from in front, the head is approximately as high 

 as broad and only moderately narrowed below, the cheeks distinctly less 

 than half as long as eye-height; antennal scape long, subcylindrical, thickest 

 near the middle and somewhat more slender at base than apex, pedicel slightly 

 more than twice as long as thick, first flagellar joint thicker and approximately 

 one and one-half times as long as the pedicel, second about as long as pedicel, 

 third to ninth flagellar joints successively decreasing very slightly in length, 

 the ninth not much longer than thick, tenth somewhat longer than the ninth; 

 mesoscutum, scutellum, and axillae sculptured like the head, the mesoscutum 

 with a very delicate median longitudinal line which is not deeply impressed; 

 sides of pronotum, mesopleura, and metapleura more shallowly punctate 

 than the dorstim, subopaque; propodeum with the declivous posterior por- 

 tion slightly concave and bounded by a distinct curved carina, the enclosed 

 area more or less horse-shoe-shaped, polished within, with a few more or less 

 distinct longitudinal striae laterally and apically and usually with a delicate 

 median carina; abdomen polished, the first tergite extending to or a little 

 beyond the middle, ovipositor sheaths slender and exserted approximately 

 the length of the fourth tergite. 



Male. -Length i .7 mm. Head viewed from in front much broader than 

 high; antennal scape a little less than four times as long as thick; pedicel 

 small, subglobose; flagellar joints hairy, i to 5 strongly serrate, the sixth slightly 

 so, 7 to 9 cylindrical; abdomen not longer than the thorax; wings hyaline. 



Type locality. --Amherst, Massachusetts. 



Type. Cat. No. 22277, U. S. N. M. 



Type female, one paratype female, and the male allotype 

 reared by Mr. A. I. Bourne, from Conwentzia lia^cni, a small 

 Neuropteron. 



