80 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.. CS 



usually the third, the venter and sides of the abdomen, and usually 

 the trochanters, femora and tibiae, yellow; the lowest bristle in the 

 frontal row much smaller than the preceding one; three proclinate 

 and one reclinate orbital bristles; parafrontals bare of bristly hairs; 

 parafacials black setulose; arista conspicuously plumose at middle, 

 thickened on the basal two-fifths; thorax lacking black vittae, with 

 three postsutural dorsocentral bristles; scutellum with three pairs 

 of strong and nearly equal marginal bristles; each of last three abdom- 

 inal segments with a transverse row of three, or sometimes four round 

 black spots on the dorsum, and two other elongate spots on lateral 

 angles; first segment without macrochaetae, intermediate segments 

 with median marginal pairs; fourth with the usual marginal row; 

 the genital segments of the male genitalia (pi. 1, fig. 3) in repose, 

 concealed, but leaving the minute, sharply pointed, divergent, and 

 slightly bowed prongs of the inner forceps exposed; wings hyaline, 

 with a strong costal spine; third vein with one to three bristles near 

 its base. 



This discussion is based on the study of the following material : In 

 the collection of the United States National Museum and Doctor 

 Aldrich's collection, one specimen from Los Angeles County, Cali- 

 fornia, two from Colorado, and one from Clementon, New Jersey 

 (Coquillett) ; one from Koebler, New Mexico (W. R. Walton) ; one 

 from Holly Springs, Mississippi (F. W. Mally) ; two from Tinajas (?) 

 Arizona (W. J. McGee) ; two from. White Springs, Florida (C. H. T. 

 Townsend) ; one from Hot Springs, Arkansas (H. S. Barber) ; two 

 from Lafayette, Indiana; seven labeled ''Parker Note 45," and one 

 labeled ''Parker Note 55," from District of Columbia. In the collec- 

 tion of Prof. J. S. Hine, one from Germit, Pennsylvania (Harbeck) , and 

 another from Clementon, New Jersey. In the collection of Nathan 

 Banks there are specimens collected from honeydew of tulip tree, at 

 Falls Church, Virginia, and in that of the Museum of Comparative 

 Zoology at Cambridge, Massachusetts, one specimen collected by 

 H. E. Smith in Massachusetts. In Dr. C. W. Johnson's collection 

 there is one specimen from Indiana. In my own collection occurs one 

 specimen from Tupelo, one from Holly Springs, and one from Mc- 

 Henry, Mississippi (H. W. Allen) ; one from Lafayette, Indiana 

 (E. W. Stafford) ; one from Agricultural and Mechanical College, 

 Mississippi (M. R. Smith). 



Range. — ^Massachusetts, New Jerse}^, Penns\dvania, District of 

 Columbia, Virginia, Indiana, Mississippi, Arkansas, Colorado, New 

 Mexico, Arizona, California. 



The puparium has been carefully described and figured by Greene ^* 

 who distinguishes the following characters. Walls smooth. Bottom 

 edge nearly straight; depression in the dorsum at about the apical 

 fifth. A deep pit at anal end, touching the horizontal bisecting plane, 



" Proc. U. S. Nat. Mus., vol. 60, p. 12, 1921. 



