ART. 9 TWO-WINGED FLIES OF TRIBE MILTOGEAMMINI ALLEN 49 



Adams, Bull. 111. Nat. Hist. Survey, vol. 11, p. 195, 1915. — Reinhard, 



Ent. News, vol. 30, p. 282, 1919. — Cole and Lovett, Proc. Cal. Acad. 



Sci., vol. 11, p. 303, 1921.— BuiMLEY, Ent. News, vol. 33, p. 24, 1922. 

 Ophelia xychus Walker, ? List 4, p. 70, 1849, after Aldrich. 

 Metopia roseri Rondani, Dipt. Ital. Prodr., vol. 3, p. 210, 1859, after Bezzi 



and Stein. 

 Melopia luggeri Townsend, Canad. Ent., vol. 24, p. 69, 1892. 

 Metopia 7neridiana Townsend, Proc. U. S. Nat. Mus., vol. 43, p. 361, 1912. 



After examination of type series at the National Museum. 



There are only two North American species of the genus, so far 

 discovered, lencocepTiala and opaca, in which the frontal vitta at 

 the middle is distinctly narrower than either parafrontal. In the 

 male of leucocephala the frontal vitta is obliterated anteriorly, while 

 the front on either side is conspicuously silvery. In. the female, 

 the vitta is not constricted to a narrow line anteriorly, and the 

 front is not conspicuously silvery. The palpi are black and dis- 

 tinctly larger than the thickened part of the arista. Thorax and 

 abdomen are black, moderately pollinose and distinctly tinged with 

 bronze. No yellow spots occur on the sides of the abdomen; the 

 first two segments with a median marginal pair of bristles, the 

 third with one or two laterals and a median marginal pair but never 

 with an uninterrupted marginal row, the fourth with a marginal 

 row of about eight. Wings hyaline; the hind cross vein nearly 

 parallel to section of fourth vein beyond the bend. Legs black; 

 front tareus of male without long erect bristly hairs, or abnormall}" 

 reduced joints; middle tibia with one strong bristle on outer front 

 side near the middle. 



My notes on this species are based on the examination of several 

 hundred specimens from all parts of the continental United States, 

 southern Canada, Cuba, a few adults collected b}^ Townsend in 

 Peru and deposited in the United States National Museum (M. 

 meridiana) and several specimens from Europe including some 

 determined by Professor Bezzi. Types of leucocephala, Q. xyclius 

 Walker and roseri Rondani as well as the numerous types of Robin- 

 eau-Desvoidy v/hicli serve to swell the synonomy of this species, not 

 seen, and their exact location not known to me. 



Range. — Throughout continental United States; NeAvfoundland, 

 southern Quebec and British Columbia, Canada; Peru; Europe. 



The characteristics of the first instar maggots in the specimens 

 studied by me agree in all but a few minor points with the descrip- 

 tions and figures published by Thompson.^* I have examined several 

 uterine maggots and find that the lateral hook does not have a blunt 

 serrated tip as figured by Thompson but ends in a blunt point 

 apposed to the tip of the median hook. The denticles, about mid- 



" Paris Edition du Bull. Biol, de la France et de la Belgique, Recherches sur les Diptcres Parasites, p. 

 ni, fig. 105, 1921. 



