NORTH AMERICAN DIPTERA. 291 



dipterologist, Professor Mik. Schiner speaks of a "Griffel" in the 

 South American Aiommia cydocera Sch. (Nov. Exped. 170) and in 

 his descri])tion of A. m-gyrophora he says the species is quite like an 

 Atmetia, save in the structure of the antennae, so that it is difficult 

 to say what the genus Atractia really is. 



MIDASID^. 



Leptoinidai^ paiitlierinus Gerstsecker, Stett. Eiit. Zeit. 1868, 85; Osten 

 Saeken, Western Dipt. 280. 



The male of this species differs very much from the female in 

 coloration, and, had I not received specimens collected together, I 

 would have believed them specifically different. In the male the 

 head, thorax and antennae are black, the pile is longer and more 

 abundant, and the constriction of the basal part of the lamella is 

 less evident, the black bands of the abdomen are broader and the 

 hind femora are sometimes largely blackish. The knob of the hal- 

 teres in the female is brown ; in the male black. 



Four specimens, Washington, California. 



Jflidas luteipeiiuis Loew, vii, 23. 



I have seen specimens of this species from Arizona (Professor 

 Comstock, No. 148). 



Midas militaris Gerstsecker, Stett, Ent. Zeit. 1868; M. vittatus Macquart 

 (lion Wiedemann), Dipt. Exot. 4e Suppl. 60, pi. iv, fig. 6; Bellardi, Saggio, etc. 

 ii, 7 (id.) 



A number of specimens (Professor Comstock, No. 149) from Ariz., 

 evidently of this species, show a considerable variation in coloration. 

 The lamella is sometimes red, the thorax varies from a coffee-black 

 to a red. The black spot on the sides of the abdominal segments 

 is sometimes wanting, and the venter and legs vary from red to 

 nearly black. 



91idas scitulns n. sp. 



M<de. — Black, abdomen with yellow bands ; lamella of antennae elongate ; 

 wings nearly hyaline, brown along the costa. Length 15 mm. 



Antennse black ; lamella considerably longer than the first three joints together, 

 broadest at the base, sinuate, and then gently tapering to near the tip. Head 

 black ; face broad, below and the oral margin deep red ; pile short, not abundant, 

 white. Dorsum of thorax opaque black, nearly bare ; the lateral margins, humeri, 

 post-alar callosities, scutellum and metanotum dark yellowish or brownish red ; 

 pleurre shining, more or less pitchy red. Abdomen shining bluish black, with a 

 yellow and reddish yellow posterior cross band on each segment ; the anterior 

 angles, extending narrowly across the front part of the anterior segments, reddish 



