Vol. XXV] ENTOMOLOGICAL NEWS. 309 



Europe, that I prefer to await the examination of the types 

 of the older authors before changing the names of any of this 

 group (with black halteres), because, as things are at present, 

 there is but little hope of arriving at a correct interpretation of 

 their descriptions, color being almost the only character used, 

 and as this is very similar in all the species it is almost hope- 

 less to attempt identifications. 



Mallochiella glabra Fallen. 



This species occurs in North America and may be separated 

 from halteralis Coquillett by the following characters : 



M. glabra. — Male : Black, including face and palpi, only the basal 

 3 joints of mid and hind tarsi yellowish at base; hind tibia very slightly 

 dilated ; last section of fifth vein recurved and shorter than the pen- 

 ultimate section of fourth; last section of fourth slightly less than 

 four times as long as penultimate section. Length, 2 mm. 



Female : Similar to the male except that the last section of fourth 

 vein is barely more than three times as long as penultimate section. 

 Length, 2.5 mm. 



M, halteralis. — Male : Black, face below antennae, palpi and base 

 of all tarsi yellow; hind tibia very much broadened; last section of 

 fifth vein generally distinctly longer than penultimate section of fourth, 

 last section of fourth vein generally five times as long as penultimate. 

 Length, 1.5 mm. 



Female : Colored as the male, and in other respects very similar ex- 

 cept that the hind tibia is not conspicuously broadened, showing only 

 a very slight thickening as in glabra. Length, 1.75 mm. 



Halteralis seems to be widely distributed in North America. 

 I have seen a large series of specimens in the collection of the 

 Illinois State Laboratory of Natural History that were reared 

 from refuse pig hair. The only specimens that I have seen 

 from North America that are referable to glabra are several 

 which I took at Frankford, Philadelphia, Pa., during Septem- 

 ber, 191 3. These specimens are in the Academy of Natural 

 Sciences, Philadelphia, with the exception of one which is 

 now in the Illinois State Laboratory of Natural History. 



AGROMYZA Fallen. 

 Owing to the addition of A. quadrisetosa in the Addenda 

 to my paper on the genus Agromy::a, and the descri])tion here- 

 with of another species with black third antennal joint, the 

 synoptic table should be altered as given here. 



