ART. 9 T\V0-WIXGP:D flies of tribe MILTOGRAMMINI ALLEN H 



plete irregular row, of which the lowest is the hirgest and is located 

 slightly beyond the middle. 



Female. — Front at narrowest point 0.19 of head width (measure- 

 ments of six as follows: 0.14, 0.18, 0.18, 0.19, 0.22, 0.23). With the 

 usual sexual difl'erences in the genitalia and length of pulvilli. Other- 

 wise like the male. 



Length, 5 to 9 mm. 



Redescribed from a long series including both males and females, 

 from the following localities: Lafayette, Indiana; Blue Ridge Sum- 

 mit, Pennsylvania; Clementon, New Jersey; Chesapeake Beach and 

 Plummer Island, Maryland; Rock Creek Park, District of Columbia; 

 Potomac Creek, Virginia; Wilmington County, Georgia; Miami and 

 Lake Worth, Florida; Victoria, Waco, and Brownsville, Texas; 

 Colorado; Minot, North Dakota: Moscow, Idaho; Emigration Can- 

 yon, Utah; Rio Aravaipa, East Verde River and Cave Creek Canyon, 

 Chiricahua Mountains, Arizona; Socoro, New Mexico; Santa Cruz 

 Mountains, Santa Clara County, Los Angeles County, and Claremont, 

 California; Kaslo, British Columbia; Porto Bello, Panama; Boracoa, 

 Cuba; specimens from Lafayette, Indiana, labelled "on parsnip 

 floAver," (J. M. Aldrich) ; ''from cells of P. cementarius" Dorchester 

 County, Maryland, (H. S. Barber); ''from nest of P. cementarius," 

 Biloxi, Mississippi; "from the nest of Tiarrisi'^ (F. M.Jones); "from 

 the nest of wasp Scelvphron cemeniarium Dr. var."; Toboga Island, 

 Panama, (J. Zetek) ; all the above in the collection of the United 

 States National Museum. Baldwin, Kansas; Columbus, Ohio; in 

 collection of Prof. J. S. Hine. Agricultural and Mechanical College, 

 Sellers, and Ocean Springs, Mississippi, in my collection. 



The conclusions of Aldrich ^ who examined the types, and of 

 Co(juillett ^ as to the identity of Townsend's {sarcophag aides) (frypox- 

 ylonis) (anica) a,ndjloride}isis has been accepted without further study 

 of the types. Major Austen of the British Museum, who has com- 

 pared a specimen of Jiondensis determined by me with the type of 

 ( Miltof/ramma) erythrura Van der Wulp, states that the latter is a 

 Pachyophthahnus but questions whether it is identical with, jloridensis. 

 He adds that "your specimen is little more than half the size of the 

 type, but in spite of this, and the fact that your specimen is a female, 

 while the type is a male, the enlarged facets in the eyes of your speci- 

 men are somewhat larger than the corresponding facets in the eyes 

 of the type. Again, the frontal stripe is black in your specimen, but 

 russet in the type in wliicli the black markings on the first three 

 abdominal tergites are less extensive and less clearly defined than 

 in the specimens forwarded by you." I find that in Jloridensis, 

 the size, color, and distribution of pollen are characters variable to a 



• Cat. of X. A. Dipt., p. 447. * U. S. Bur. of Ent., Tech. Sor., No. 7, p. 80. 



