ART. 9 TWO-WINGED FLIES OF TBIBE MILTOGEAMMINI ALLEN 43 



of bristles; third and fourth segments with marginal rows; macro- 

 chaetae on first three segments short, on anal segment slightly larger. 

 Wings hyaline; third vein with four or five bristles extending less than 

 half way from base to small cross- vein. Legs black; the basitarsus 

 of front leg in male slightly longer than last lour joints, in female 

 distinctly shorter; pulvilli much shorter than last tarsal joint and of 

 equal size in both sexes. 



Range. — Massachusetts, New Jersey, Maryland, Mississippi, Ohio, 

 Indiana, Wisconsin, Iowa, Nebraska, New Mexico. 



Host relat io nsh ips . — Unlviio wn . 



The following material has been examined. The type, a male 

 from Atlantic City, New Jersey, in the collection of Dr. C. W. John- 

 son; males and females from the following localities: two, Horseneck 

 Beach, Massachusetts, (Coquillett); Iowa; Chesapeake Beach, Mary- 

 land (R. C. Shannon) ; Las Cruces, New Mexico, (C. H. T. Townsend) ; 

 Lincoln, Nebraska, (O. C. Bradbury) ; twenty-nine, Lafayette, Ind. 

 including two labeled "from Asclepias incarnata" and one, "flowers 

 of Solidago" (J. M. Aldrich) ; two, Crawfordsville, Indiana; all in 

 the collection of the U. S. National Museum, including the Aldrich 

 collection. Six specimens from Sandusky, Ohio, Cedar Point, in 

 the collection of Prof. J. vS. Hine. Specimens from Milwaukee, 

 Wisconsin. (S. Graenicher) ; Chesapeake Beach, Maryland; Massa- 

 chusetts; Lafayette, Indiana; in the collection of the Museum of 

 Comparative Zoology at Cambridge, Massachusetts, and in that of 

 Nathan Banks. Two from Tupelo, Miss. (H. W. Allen) ; two. West 

 Springfield, Massachusetts, (H. E. Smith) ; in the collection of the 

 writer. 



Very little is known of the biology of this species. Dr. J. M. 

 Aldrich 's observations indicate that the adults are attracted to 

 flowers. The reproductive organs of two dried specimens have been 

 studied. One was found to contain 61 and the other 79 eggs, which 

 is a rather large number for Miltogramminine flies. The eggs (pi. 4, 

 fig. 20) were elongate, all at nearly the same stage of development, 

 and in one of the specimens contained partly developed maggots in 

 which the buccopharyngeal apparatus was faintly visible, the thin, 

 delicately reticulated chorion was persistent over the anterior end 

 of tlie maggot, but was rolled away from the posterior end of the 

 body. Owing to the condition of the specimens dissected, it was 

 impossible to determine the nature of the internal reproductive 

 organs, but from the presence of partially developed maggots already 

 partly freed from the chorion, it is probable tliat the species deposits 

 active maggots. 



