PROC. ENT. SOC. WASH., VOL. 21, NO. 7, OCT., 1919 163 



at apex; second cubital cell slightly narrowed toward apex. Abdomen about 

 as long as thorax, broadly elliptical ; first tergite bicarinate basally, depressed 

 between the carinae, the apical half broadly elevated and aciculate-punctate 

 medially", the lateral margins smooth; tergites beyond the first smooth and 

 polished; ovipositor concealed from above, retracted within the large cavity 

 formed by the last dorsal and last ventral segments. Spot enclosed by 

 ocelli, eyes, antennae entirely, prothorax beneath, mesosternum and lower 

 part of mesopleura, metathorax, propodeum, first tergite, and ovipositor 

 sheaths, black; palpi, all tarsi, and more or less of the abdomen beneath 

 blackish; wings faintly fuscous on basal half, subhyaline on apical half, the 

 veins and stigma blackish; remainder of the insect reddish testaceous. 



Type locality. New York City, New York. 



Type. Cat. No. 22373, U. S. Nat. Mus. 



Type and one female paratype labelled "Collected on beet; 

 New York, N. Y.; July 11, 1916; H. B. Shaw, collector; Chittenden 

 Number 4972 Ol ." Also one female paratype labelled "Parasite, 

 on Pegomyia hyoscyami Panzer; Brooklyn, N. Y.; August 9, 

 191S; Montague Free, collector." 



Opius turneri, new species. 



In the writer's previously mentioned key to species of Opius 

 (1. c.) this species runs to category 50 where it agrees with the 

 first character of the second alternate but not with the second 

 character of that alternate, the propodeum being broadly pol- 

 ished medially. Besides the differently sculptured propodeum 

 it differs from oscinidis Ashmead by having the mesopleural 

 impression not crenulate, the first tergite granularly sculptured 

 instead of irregularly striate, and the cavity between mandibles 

 and clypeus more distinct. From americanus Gahan it differs 

 in addition to the differently sculptured propodeum, by lacking 

 the tooth on ventral margin of mandible, by the distinct cavity 

 between clypeus and mandibles, and by the much more weakly 

 sculptured first and second tergites. Resembles bruneipes Gahan 

 but is at once distinguished by the sculptured first and second 

 tergites and the partially sculptured propodeum. 



Female. Length 1.25 mm. Head viewed from above more than twice 

 as broad as long; ocellocular line more than twice the diameter of an ocellus; 

 head polished, impunctate, the face very sparsely hairy, without punctures 

 and without a distinct median ridge; malar space a little shorter than the 

 basal width of mandible; cavity between clypeus and mandibles transverse- 

 linear but distinct; eyes ovate, moderately large, about twice as wide as 

 the posterior orbits; antennae inserted above the middle of eyes, 22-jointed 

 in type, the first flagellar joint fully three times as long as thick, following 

 joints gradually decreasing in length but none less than twice as long as thick. 



