Malloch — Notes and Description of some Anthomyiid Genera. 67 



tylus is the only character that might be used in their separation, and 

 that does not appear to me to be sufficient grounds for the retention of 

 Alloeostylus. 



Achaetina, gen. nov. 



Genotype, Muxca ciliata Fabrieius. 



Lioy erected the genus Microcera, for this species in 18(54, but that name 

 had been used previously by Meigen (1803) and Zetterstedt (1838). At 

 present the species is included in Hydrotaea. 



The genus is separable from Hydrotaea by the absence of the anterior 

 intra-alar bristle and the presence of numerous hairs on the upper part 

 of the hypopleura anterior to the spiracle. 



The genotype has been recorded from North America. A second species 

 occurs on this continent, cressoni Malloch. 1 included both of these 

 species in my recent synopsis of Hydrotaea.* 



liremoniyioides, gen. nov. 



Genotype, Eremomyia cylindrica Stein. 



This genus is distinguished from all other Anthomyiidae known to me 

 by the presence of hairs on all parts of pleurae including the exposed 

 lateral and ventral areas of prothorax. 



The genus Eremomyia Stein is not easily separated from Hylemyia, and 

 certainly not invariably so, by the duplication of the posthumeral bristle, 

 as many species that undoubtedly belong to Hylemyia have the seta laterad 

 of the posthumeral strong and bristledike. It is unfortunate thatCoquil- 

 lett selected humeralis as the genotype instead of cylindrica. 



There are three species of Eremomyioides known to me, cylindrica 

 Stein, setosa Stein, and par keri, sp. n. 



The species may be separated as follows : 



Females. 



1 . Apical dorsal segment ( fourth visible) of abdomen obtusely rounded, 



curved over apex of abdomen and armed with closely placed long 

 bristles, appearing tufted ; genital segments retracted within a 

 small orifice in venter near apex ; femora black except at apices ; 

 hind tibia with 4-5 postero-dorsal bristles parkeri, sp. n. 



— Apical dorsal segment of abdomen not obtusely rounded and curved 



over apex of abdomen, truncate, the genital segments withdrawn 

 into an apical opening, the fourth segment with a few sparse bris- 

 tles, not appearing tufted 2 



2. Femora black; costal setulae much longeron basal half of wing than 



diameter of costal vein, the longest one at least twice that length; 

 hind tibia with a bristle on anterior surface midway between the 

 antero-dorsal and antero-ventral bristles setosa Stein 



— Mid and hind femora reddish ; costal setulae but little, if any, longer 



than diameter of costal vein ; no bristle on anterior surface of 

 hind tibia cylindrica Stein. 



* Bull. Brooklyn Ent. Soc, Vol. 11, p. 108, 1916. 



