AET. 3 EEVISIOISr OF ICHISTEUMOI^-FLIES CUSHMAW 11 



front and middle pairs, especially tibiae, paler, tarsi and extensor 

 surface of hind tibia sometimes more or less inf uscate ; membranous 

 apical portion of tergites sometimes whitish, giving the abdomen a 

 transversely banded appearance. 



Male. — Antennae slender, nearly as long as body, flagellar joints 

 nearly cylindrical, first joint a little more than twice as long as 

 thick, distinctly thicker than, and one and a half times as long as, 

 second, middle joint distinctly less than twice as long as thick; legs, 

 especially tibiae and tarsi, much more slender than in female and 

 hind tarsus less distinctly shorter than tibia, apical joint only about a 

 half longer than second, that of middle leg hardly twice as long as 

 second joint, front tarsus distinctly longer than tibia; first tergite 

 three or four times as long as broad, only slightly arched above 

 spiracles, longitudinally striate to apex, sternite extending beyond 

 spiracle more than half way to apex; color as in female. 



The foregoing discussion and description are based on 27 females 

 and 4 males in the National Museum, 10 females and one male in 

 the Cornell Collection, one female and three males in the Canadian 

 Collection, and three females in the collection of the Pennsylvania 

 Department of Agriculture. These 38 females and 8 males show a 

 range of from 8 to 13 mm. for females and 6 to 10 mm. for males. 



The distribution indicated by these specimens and by published 

 records is from Nova Scotia and South Dakota to North Carolina 

 and Arkansas. 



ODONTOMERUS TIBIALIS, new species 



Figs. 2&, 3c, and d 



Odontomerus canadensis Rohwek, Proc. U. S. Nat. Mus., vol. 57, 1920. p. 458, 

 male (part). — Bradley, Bull. Brooklyn Ent. Soc, vol. 13, 1918. p. 12, male 

 (part). 



Odontomerus melUpes (Say) Waixey, Can. Ent., vol. 59, 1927, p. 74, female 

 (part). 



Because of its entirely black hind tibia and tarsus this may prove 

 to be the true canadensis Provancher, but Provancher described his 

 species as being brilliantly polished, and one of the most striking 

 features of the present species is its punctate mesoscutum and 

 scutellum. It seems hardly likely that Provancher would have over- 

 looked this sculpture if it were present in his specimens. 



Five of the males of the type series were placed by Rohwer under 

 canadensis, and one of them was compared by him with Provan- 

 cher's male. The females here described have been received since 

 Rohwer made his study of the genus. Walley had the species con- 

 fused with mellipes. 



Female. — ^Length 11 mm. Head about as in mellipes, but posto- 

 cellar line about three-fourths as long as ocell-ocular line; facial 



