532 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.55. 



HELCOSTIZUS BICARINATUS. new species. 



Differs from all other species known to me in the possession of the 

 apical carina of the propodeum with strongly rugose petiolar area 

 and the entire loss of the second intercubitus, the areolet not being 

 defined even by position. In other respects differs only in minor 

 details from fiskei (Viereck). 



Female. — Length, 10 mm.; antennae, 6 mm.; ovipositor, 1.5 mm. 

 Head rather strongly transverse, cephalo-candad length of temple 

 barely half that of eye ; distance between occipital carina and poster- 

 ior ocellus scarcely longer than postocellar line; face densely, finely 

 punctate; clypeus without a distinct median tooth; malar space 

 shorter than basal width of mandible; thorax above densely, finely 

 punctate, laterally irregularly striato-punctate ; propodeum with 

 two transverse carinae, coarsely granulate above, rugose laterally and 

 posteriorly, spiracle much nearer to base than to basal carina ; areolet 

 not indicated, the second intercubitus wanting; abdomen coarsely 

 granular, first tergite about three-fourths as wide at apex as long, 

 strongly, almost subangulately, elevated with dorsal carinae broaden- 

 ing out posteriorly into strong ridges. 



Black; with antennal annulus embracing more or less of flagellar 

 joints 6-9, palpi, tegulae, and extreme apices of middle abdominal 

 segments white, legs largely red, front coxae black, the extreme apex 

 white, the tibia and tarsus black with white basal annuli, the same 

 pattern but less distinct on middle leg. 



Type-locality. — Falls Church, Virginia. 



Type.— C&t. No. 21634, U.S.N.M. 



Described from a single female taken April 28, 1917, by Wm. 

 Middleton. 



HELCOSTIZUS FISKEI (Viereck). 



Asternaulax flslcei Viekeck, Proc. U. S. Nat. Mus., vol. 42, 1912, p. 632. 

 Helcostizus fiskei (Viereck) Rohwer, Proc. Ent. Soc. Wash., vol. 15, 1913, 

 p. 185. 



Except for the lack of the apical carina of the propodeum and the 

 defined areolet this species differs from hicarinatus Cushman, de- 

 scribed above, principally as follows : Cephalo-candad length of tem- 

 ples more than half as great as that of the eye; distance between 

 occipital carina and posterior ocelli much longer than postocellar 

 line; malar space subequal to basal width of mandible; clypeus with 

 a distinct, median tooth ; punctuation of entire body much finer and 

 less dense, the propodeum being without rugulosity and very finely 

 reticulate granulate as is also the abdomen ; propodeal spiracle about 

 midway between base and basal carina ; first tergite nearly as wide at 

 apex as long ; color practically the same except that inflated portion 

 of front tibia is whitish with an obscure dark stripe in front, and the 

 antennal annulus is confined to joints 6-8. 



Recresented only by the unique type. 



