NO. 1938. THE DIPTEROUS FAMILY PHORIDA^— MA LLOCH. 459 



APHIOCH^ETA JULI Brues. 



Yellow; frons yellow, upper part brownish, or all brown, lower 

 post-antennal bristles very small, not half the size of the upper pair, 

 antennae brownish-yellow, palpi yellow, normal ; thorax dull yellow, 

 four nearly equal scutellar bristles, mesopleurse with a number of 

 very short bristles and one long and veiy strong backwardly directed 

 bristle, abdomen with the apex of first segment with a black band, 

 the other segments dark brown except the narrow hind marginal 

 bands which are yellow, several bristles on sides of second segment; 

 legs yellow, the apices of hind femora darkened, hind tibial setulse 

 (7-8) very weak but long and widely placed ; costa to middle of wing, 

 first division as long as other two together, third division about one- 

 third as long as second, fourth vein leaving at just beyond fork, 

 slightly curved at base and ending before wing tip; halteres dusky. 



Length, 2 mm. 



Mr. H. S. Barber obtained a good series of females and one male 

 at Plummers Island on May 12, 1912, which came to myriapods he 

 had placed in a jar. The male differs only in having an entirely 

 black abdomen. 



Later the same observer succeeded in rearing a number of speci- 

 mens from a myriapod and informs me that it is freely attracted to 

 specimens of Spiroholus marginatus if they are placed in an exposed 

 place on Plummers Island. 



Tliis is the species described as xantippe, Banks ^ Brues describes 

 his species as a Plastophora and at first I had difficulty in associating 

 it with Banks' species. 



APHIOCHiETA PERDITA, new species. 



Female. — Yellow; frons clear yellow, longer than in xantippe 

 Banks, the anterior pair of post-antennal bristles are about half as 

 large as the posterior or upper pan*, the center pair or bristles are 

 also much lower on frons than in xantippe, the anterior pair of 

 scutellar bristles are only half as large as the posterior pair, the small 

 mesopleural bristles are more distinct, the large one beuig smaller 

 than in xantippe and situated much lower on the mesopleurse, the 

 abdomen is yellow with the apex of first, the whole of second, and 

 most of third segments, as well as extreme tip of abdomen black, the 

 second segment is much elongated, and dilated laterally on basal half 

 wdth two to three bristle-like hairs on the dilated portions; the legs 

 are colored as in the previous species, but the hind tibial setulae are 

 much more distinct, closer placed, and more numerous (12-13) than 

 in xantippe; halteres yellow. 



Length, 2h mm. 



1 Trans. Wash. lint. Soc., 1911, p. 212. 



