392 CHARLES T. BRUES. 



U \ MMM I I « lil A Cook. 



1897. Cook, Science, vi, 886. 



1898. Wandolleck (Cook'sehe Gattung), Zool. Jahrb. Abth. f. Syst., 417. 

 1901. Becker, Monog. Phoridse, 87. 



1901. Brues, American Naturalist, xxv, 339. 



Related to Chonocephahis Wand. Male winged; female entirely 

 without wings or halteres. Female with very small eyes and no 

 ocelli ; thorax small ; abdomen with seven segments. Third an 

 tennal joint spherical, with an apical arista. Pul villi pectinated, 

 empodia setifonn. 



This genus is represented by a single species from West Africa, 

 found upon land snails belonging to the genus Achatlna. The spe 

 cies has never received a name, ami I, therefore, designate it as W. 

 cooki, in honor of its discoverer Dr. O. F. Cook. 



GENERA OF UNCERTAIN POSITION. 

 Under this head I have attempted to group all of the genera which 

 have been too poorly characterized to admit of recognition, or which, 

 for the various reasons set forth under each, will have to be ignored. 



IMIKIW Lioy. 

 1864. Lioy Atti, Soc. Veneti., 77. 



" Face often with an impressed line. Frontal macrochretae directed 

 downwards ; legs setulose, posterior tibiee usually very spinose. Wings 

 slightly ciliated on the margin ; marginal vein bifurcate at the apex, 

 submarginal reaching to the apex of the wing, arcuate at the base 

 and straight at the extremity ; anal vein wanting, median nervure 

 straight." 



" The name refers to the absence of the anal vein." 



Type, A. urbana Meig. 



According to Becker, P. urbana Meig. possesses four discal veins 

 and the frontal bristles are all reclinate. If such be the case, Aneti- 

 rina cannot be retained as a valid genus, which would be of doubt- 

 ful propriety, anyhow, even if the diagnosis were correct. This must 

 evidently have been based upon wrongly determined specimens. 



OBELOSIA Lioy. 

 1864. Lioy Atti, Soc. Veneti.. 77. 

 " Macrocha3ta3 of the front directed downwards, posterior tibia? 

 with small spines, intermediate ones bare, with a long terminal 

 spine. Wings ciliated with the marginal vein bifurcate at the ex- 



