:2 2 8 The Ohio Xaturalist. [Vol. II, No. 5, 



NEW OR LITTLE KNOWN DIPTERA. 



JAS. S. HiNH. 



Nemotelus pallipes Say. 



This species was described b}' Say iu 1823, but so far as I am 

 aware has not been recognized since. A half dozen specimens 

 taken near Cincinnati, June 12, of last year seem to be this 

 species. There is slight variation, but some of the characters 

 which Sa}' mentioned are conspicuous ; in all, the coloration 

 agrees in general and the size corresponds exactly with Say's 

 measurements. Some differences that might be mentioned are 

 the coloration of the legs and ventral segments. The basal three- 

 fourths of all the femora are black, and the middle and posterior 

 tibiae, except at base and apex, are usually a very dark brown, 

 although there is some variation in the latter case. The front 

 tibiae are usually yellow, but even here a shade of brown is some- 

 times present. The rufous coloration of the posterior edges of 

 the middle of the ventral segments is not evident, but the whole 

 venter is a uniform black. 



I am inclined to believe that this is Say's pallipes, for it .seems 

 that the con.spicuous, triangular, white spot above the antennae 

 is a convincing character. It might be mentioned that this spot is 

 genimate, being separated in the middle by a narrow, black space. 



Pachygaster maculicornis n. sp. 



Black ; lower part of front, and face next the eye.s with an edging of sil- 

 very white pollen ; antennte yellow, third joint on its inner surface with a 

 conspicuous brown spot from which the species is named, also the third joint 

 is transverse, the perpendicular diameter being nmch the longest, and the 

 slender ari.sta appears to spring from the upper front part, although techni- 

 cally speaking it is apical ; as all the extension of this joint is above, the 

 antennte have the appearance of being turned upward at the tips. Femora 

 except at base and apex, black, remainder of legs and knobs of hal teres 

 entirely pale yellow ; thorax above clothei with yellow, recumljent pile, 

 giving a metalic appearance if viewed without the aid of a lens ; wings hya- 

 line, venation as in Pachygaster pulcher, stigma pale ; abdomen with .short, 

 white hairs. I^ength 2\4 mm. Habitat, Onaga, Kansas. Three female 

 specimens. 



We have three specimens procured by exchange from F. F. 

 Crevecoeur. By reading the description of Zabrachia polita Coq. , 

 I conclude that the species resembles that insect, but the third 

 vein is branched and of the usual length. Again it suggests 

 Cynipimorpha, ])ut the scutellum is rounded at the apex. I 

 would place it in Pachygaster without hesitation were it not for 

 the antennae, which seem to agree with Williston's description of 

 the antenme of Cynipimorpha minuta, and are therefore quite 

 different from these organs in Pachygaster pulcher. I place it 

 here provisionally. 



