40 



Tlie following table may be used to separate the genera : 



Ai Primaries with all 12 veins present. 



as Vein Ri of primaries from Ri after R3 Alpheias. 



bj Vein R3 of primaries from R. before R; Macrolhcca. 



Bi Primaries with only II veins. 



a: Vein R: stalked with Rj and Ra 4lfhcioidcs. 



h: Vein R:: free from the cell Dccaluria. 



Genus Alpheias Rag. (Type A. baccalis Rag.) 



Alpheias Ragonot, Ann. Soc. Ent. ¥t. 1890-91, p. 543. 

 Amcstria Ragonot, .'\nn. Soc. Ent. Fr. 1890-91, p. 545. 



Antennae in both sexes ciliate ; proboscis and maxillary palpi wanting ; 

 labial palpi in 3 short, tufted, in $ long, rostriform ; hind tibiae with two 

 pairs of equal spurs; primaries with vein R: stalked with veins R3-R5; Rs from 

 R< before Raj Mi from above middle of discocellular, "isU. and Ma shortly 

 stalked ; Cui from lower angle of cell ; Cu; from well before angle ; anal vein 

 branched; secondaries with S.C. and R stalked; Mi from upper angle of cell, 

 Mj and Cui connate from lower angle of cell; M; wanting; Cu= from well be- 

 fore angle of cell ; frenulum present. 



The genus contains 4 species: — A baccalis and ,/. gitoiialis from 

 Sonora. Mexico; A. ocitlifcralis from Texas and A. f<onda Dyar from 

 S. California. We figure the latter species (PI. Ill, figs. 10 and 13), 

 the only one known to us. 



Genus Macrotheca Rag. (Tyi)e .1/. iiitcralbicalis Rag.). 



Macrolhcca Ragonot, Ann. Soc. Ent. Fr. 1890-91, p. 544. 

 Cacothcral'ia Dyar, Proc. Ent. Soc. Wash VI, i6a (1904). 



Antennae in both sexes ciHate ; proboscis and maxillary palpi absent ; labial 

 palpi in $ short, tufted, in 9 long, rostriform; bind tibiae with two pairs of 

 equal spurs; primaries with vein R; connate or slightly stalked with Ri ; R.i from 

 Ri before Rs; Mi from above middle of discocellular; Ms and Mi stalked; Cui 

 from lower angle of cell; Cu; from well before angle; anal vein branched; sec- 

 ondaries with S. C. and R stalked; Mi from just below angle of cell; Ma and 

 Cui connate from lower angle of cell; M- wanting; Cu; from before angle of 

 cell ; frenulum present. 



The genus contains three species: M. iiitcralbicalis Rag. described 

 from Sonora, Mexico; we figure (PI, III, figs. 9 and 12) a pair from 

 Redington, Ariz., which agrees closer with the original description 

 than with the figure given by Ragonot ; the 9 shows more light brown 

 sulTusion than the S ; tiic patch in the c^ll may or may not contain a 

 distinct eye-like spot : iU. nigrocincrcclla Hist. ; may be distinguished 



