NO. 1938. THE DIPTEROUS FAMILY PHORID^—MALLOCH. 495 



rather than an inquiline or parasite. There is only one species with 

 the characteristic scale-Hke hairs besides this, namely, hirtiventris 

 Wood, but in that species the hind tibiae have the apical third shaped 

 much as in alhiddhalteris Felt. 



Represented in the collection by specimens from the District of 

 Columbia, Massachusetts, Maryland, California; Kaslo, British 

 Columbia; Toronto, Canada; and England. 



APHIOCHiETA PULICARIA Fallen. 



Variable in color, but generally brown or brownish black; frons 

 black, about one-half broader than long, post-antennal bristles of 

 nearly equal size, palpi yellow, normal; abdomen not slender as in 

 rufipes, but of the normal shape in male, segments subequal, anal 

 protuberance in male small and inconspicuous, ventral plate of the 

 hypopygium large and distinctly visible; legs yellow, more or less 

 tinged with brown, no long hairs on ventral surface of hind femora; 

 wings tinged with yellowish-brown, especially in female, costa quite 

 to middle, fringe not so long as in rufipes, first division longer than 

 second but never longer than second and third together, angle of 

 fork not so acute as in rufipes, variable sexually, fourth vein strongly 

 curved at base, more so in female; hal teres yellow. 



Length, l-J-2 mm. 



There is a specimen in the collection bearing this name which 

 agrees with description given above. 



Locality. — Plummers Island, Maryland, November 3, 1906 (A. K. 

 Fisher). It has been recorded by Brues from Massachusetts, 

 Louisiana, South Dakota, Idaho, and California. This species is 

 very similar to evarthse, but in evarthse the female especially has the 

 first division distinctly longer than the other two together. The 

 arrangement of the frontal bristles is the same in both species, that is, 

 the post-antennals are close together, and the center pair in first row 

 are but little lower than the outer pair, being much nearer center of 

 frons than the other pair, but nearer to them than to the post-antennal 

 upper pair. 



APmOCH^TA SETACEA Aldrich. 



Plate 37, fig. 8. 



Male and female. — Black-brown, hardly shining, frons about as 

 long as broad, dull, and with numerous short hairs in addition to the 

 ordinary bristles, lower pair of post-antennals nearly as large as upper 

 pair and closer placed, center pair of bristles in fii'st row directed 

 toward center of frons, distinctly lower than outer pair and notice- 

 ably further from eye-margin, antennas rather small, black, arista 

 black, nearly bare, and hardly longer than frons, palpi yellow, normal; 

 thorax black brown, hardly shining, pleurae paler toward coxae; 



