Se pt.,8 9 8.] Coquillett: On Dipterous Family Scatophagid^e. 161 
Osten Sacken catalogue it bears the name of Cordyluridse, but since the 
genus Scatophaga is the oldest one in this family, it is desirable to name 
the family after it. . 
The European genera and species of this family have quite recently 
been monographed by Mr. Theodore Becker,* and a translation of his 
tables of subfamilies and genera, in an abbreviated form, is given by Dr.. 
Williston in his recent manual. Owing to the faulty definitions of the 
subfamilies, whereby certain genera which possess a given character are 
placed in a subfamily in which this character is expressly stated to be 
absent, and the further difficulty of separating subfamilies by such 
Walkerian phrases as “face short,” “face long,” it will be quite im¬ 
possible for the student to refer his species to its proper genus by the use 
of these tables, and I have therefore constructed an entirely new one 
which contains all of the genera belonging to this family known to me 
to occur in this country. 
TABLE OF GENERA. 
i Front tibiae destitute of an erect black spine on the inner side of each near the 
... 2 
Front tibiae each bearing such a spine, third antennal joint rounded at the apex, 
palpi destitute of an unusually long bristle at apex of each, one sternopleura 
macrochseta.Acanthocnema Becker. 
2. Third antennal joint produced in the form of a tooth at the anterior apical angle.. 3 
Third joint rounded at the apex .. • • • * 7 ' 5 
, With three sternopleural macrochoetae, palpi destitute of an unusually long bristle 
■** r .Orthochaeta Becker. 
at apex of each. . . . , . , 
With two sternopleurals, palpi near apex of each bearing a bristle which is nearly 
one-half as long as the palpi.• - Xhaetosa, gen. nov. 
With only one sternopleural, palpi destitute of a single long terminal bristle ., 4 
4 Palpi spatulate, about twice as long as wide. Spaziphora I ond. 
Palpi more than four times as long as wide.Opsiomyia, gen. nov. 
5. Apex of palpi each bearing a single bristle which is nearly as long as the pa PL 
one sternopleural. 
Apex of palpi destitute of such a bristle.. 7 
6. Head at least as high as long, face nearly perpendicular. Cordylura fall. 
Head flattened, noticeably longer than high, face very oblique, greatly retreating 
below...Acicephala, gen. nov. 
7. With only one sternopleural.. “7 “ 7 . 
With two sternopleurals, frontal bristles strong, two or more pairs on anterior thir 
-, , , .Hexamitocera Becker. 
8. Frontal bristles strong, two or more pairs on anterior third of the front. 
Scatophaga Metg. 
Frontal bristles very short, none on lowest third of the front. Hy dromy za Fallen. 
* Berl. Ent. Zeitsch., May, 1894, pages 77 to 196. 
