178 INSECUTOR INSCITI^E MENSTRUUS 



Argentoepalpus, new genus. 



Genotype, Bpalpus tiiveus Townsend, 1914, Ins. Ins. Men- 

 str.. II. 13fi-137. 



Second aristal joint elongate. Scutellum and abdomen with 

 heavy spines. No median marginals on first segment ; no com- 

 plete marginal row on second, but closely-set row of about six 

 to eight marginals in middle, with median discal row of about 

 six, and median anterior row of about four ; third segment 

 with closely-set marginal row, median discal row of about 

 eight, and one median anterior pair in female but not in male ; 

 anal segment thickly spined on posterior half. The four seg- 

 ments bear thick lateral discal spine bunches, and the sternites 

 are heavily spined. Three sternopleurals, three postintraalars, 

 four postsuturals, three preacrostichals, three postacrostichals, 

 two lateral scutellars and one weak divergent apical pair of 

 scutellars in addition to the erect spines. Two to three proclin- 

 ate orbitals in female, and one reclinate orbital in both sexes. 

 No ocellars. Two strong verticals in both sexes. 



Acronaristopsis, new genus. 



Genotype, Acronaristopsis bahamensis, new species. 



Allied to Schizotachina. Clypeus and facialia welded into 

 a single broad flat subtriangular plate. Parafacialia extremely 

 narrow, sublinear. Eyes bare. Cheeks about one-third eye 

 length, and vertex over one-third head width in female. Pro- 

 boscis very short, palpi short and stubby. Second antennal 

 joint somewhat elongate, third joint of female simple and one 

 and one-half times second. Ocellars divaricate. Apical cell 

 narrowly open just before tip. First vein spined to tip, third 

 vein half way or more to tip, fifth vein half way to hind cross- 

 vein. No median macroch?et?e on first two segments. Arista 

 short, thickened three-fifths way, second joint long. 



Acronaristopsis bahamensis, new species. 



Length, (i mm. One female, Nassau, Bahamas (Dr. H. G. 

 Dyar). 



Blackish Jbrown, very thinly silyery pollinose. Antennae 

 and palpi dull fulvous. Four faint thoracic vittie, the inner 



