]{)2 NKW NORTH AMERICAN ANTHOMYIIDAE (dIPTERa) 



nizcd Fore coxae prodvu^ed in the form of a large, stovit, rounded protuber- 

 ance at apex anteriorly; fore tibia with one or two postero-ventral bristles, 

 no ventral or posterior bristles; fore tarsus subequal to tibia in length, fourth 

 joint with two bristles at apex on posterior side; mid femur attenuated basally, 

 swollen for a short distance beyond middle and armed on the swollen part 

 ventrally with a clump of very long fine bristles; mid tibia with a variable 

 number Of bristles on postero-dorsal and posterior surfaces; hind femur 

 with long bristles on apical half of antero-vcntral surface; hind tibia slightly 

 producH^d at apex on ventral side, with a few short bristles on basal half of 

 antero-ventral surface, a fringe of setulae on antero-dorsal surface which 

 are longer on basal half, and a number of longer bristles on basal half of 

 postero-dorsal surface; basal joint of hind tarsus with a basal ventral bristle. 

 Length, 6.5 mm. 



Allotype.— d'; West ('oast of Greenland, 1891, (Mengel and 

 Hughes, on the Peary Expedition), [A. N. S. P.]. One other 

 female seen, with same chita. 



NEODEXIOPSIS gen. n. 



Tliis genus is s(>i)arated from Cariddla by the following ehar- 

 aeters: thorax with four pairs of dorso -central bristles; scutellum 

 with four bristles of equal length; hind tibia with three bristles, 

 one antero-ventral, one antero-dorsal, and one postero-dorsal, 

 the first-mentioned bristle situated apicad of the second and 

 not ])asad of it as in Cariciella. 



Genotype. — Dexiopsis bamlis Stein. Monolxisic. 



MACORCOENOSIA gen. n. 



This genus differs fi'om the preceding by the armature of fore 

 tibia and form of the mak^ abdomen particularly, the latter being 

 elongate and cylindrical, with the fifth sternite exposed, while 

 in Ncodexiopnifi it is ovate and the fifth sternite is usually con- 

 cealed. 



Genotype. — Coeno.sut trisetn Stein. ]\Ionol)asic. 



XENOCOENOSIA g( ti n 



The characters which serve to distinguish this genus from 

 Coenosia are as follows: hind til)ia with l>ut one biistle on the 

 antero-doi'sal surface; ocellar bristles much weaker than upper 

 oi'l)itaIs, not longer than postvcrtical pair; lower ]iosterior sterno- 

 pleiual bi'istle nearer to upper than to anterior bristle. 



Genotype, — CoGnoHio calopyya Loew. 



