ART. 9 TWO-WINGED FLIES OF TKIBE MILTOGKAMMINI ALLEN 3 



Harned, of Agricultural and Mechanical College of Mississippi, for 

 providing an opportunity to study collections in the Eastern States, 

 to J. R. Ricks, director of the Mississippi Agricultural Experiment 

 Station, for allowing time for the completion of the manuscript; 

 and to Prof. E. W. Stafford for much helpful criticism. Thanks are 

 due, also, to Nathan Banks, J. R. Malloch, Prof. J. S. Hine, C. 

 Howard Curran, H. J. Reinhard, C. S. Brimley, A. F. Burgess, Dr. 

 H. T. Fernald and R. C. Shannon for allowing me to examine their 

 collections or the collections in their charge. 



CLASSIFICATION 



Family SARCOPHAGIDAE 

 Subfamily Miltogramminae 



The Miltogramminae are a group of Muscoid flies closely related 

 both to the Tachinidae and the Sarcophagidae, but in both morphol- 

 ogy and habits, more closely resembling the latter. The adults 

 may be distinguished from any Tachinidae that have come under 

 my observation, by the presence of an undivided postscutellum (fig. 

 1, B, mP, compare with A and C) the possession of an enlarged second 

 sternite wliich overlaps the tergite of the first abdominal segment^ 

 on the sides (fig. 2, B, 2s, compare with A and C). From the Sarco- 

 phaginae they may be distinguished, usually, b}" the Tachinid 

 habitus, and by the arista, wliich is naked or at most with incon- 

 spicuous plumosity scarcely longer than the thickness of the arista. 

 The outer forceps of the male genitalia are usually several times as 

 long as wide and approximate or exceed the inner forceps in size; 

 whereas in the Sacophaginae they are reduced to the so-called " ac- 

 cessory plate." 



The Miltogramminae of North America may be divided into two 

 tribes on the following adult characters: 



1. Impression of the bucca, near the vibrissal angle, large, conspicuously sub- 

 merged below the surface level of surrounding sclerites, color of impression 

 usually contrasting conspicuously with that of the parafacials and remainder 

 of bucca; orbital bristles present on females, but usually lacking on males; 

 mesotibia on outer front surface near the middle usually with more than one 



macrochaeta Tribe Amobiini 



Impression of bucca, near vibrissal angle, small, not deeply submerged or con- 

 spicuously differentiated by color from the parafacials and the remainder of 

 the bucca; orbital bristles present in both sexes or lacking in both males and 

 females; mesotibia on outer front surface near the middle with never more than 

 a single marcochaeta; sternopleuron at most with two bristles; abdomen 

 without discal macrochaetae Tribe Miltogrammini 



1 Actually the second abdominal tergite, the first having been reduced to a vestigial sclerite. Most 

 taxonomic workers in calypterate Muscoidea refer to the first plainly visible segment as the first abdominal 

 segment, which is the procedure adopted in this paper. Compare Young, Cornell Agricultural Experi- 

 ment Station, Mem. 44, figs. 38 to 76, 1921. 



