540 CALIFORNIA ACADEMY OF SCIENCES. 



projecting equally with the anterior lamina, wider at apex 

 than at base. 



A slight yellow cloud at the extreme base of all the 

 wings. Front wings wdth 9-12 antecubitals, 7-8 postcu- 

 bitals, discoidal triangle with one cross-vein, internal 

 triangle 3-celled (2-celled in one wing of i ,5 ), 3 post- 

 triangular cells, then 2 rows. Hind wings with 7-8 

 antecubitals, 8-9 postcubitals, triangle free. 



Total length 35-37. Abdomen 24.5-26. Hind wing 

 27-28.5. Pter. 3. Width of abdomen at 2 : 2, at 5: .9, 

 at apex of 7: 2, at 10: i. 



A male from Hayti (probably — Am. Ent. Soc. coll.) 

 agrees with the above, except that the tendency to form 

 an inferior tooth on the superior appendages is not so 

 distinct. 8-9 antecubitals on hind wings, length 34, abd. 

 24, hind wing 26.5. 



A female from Hayti by Dr. W. L. Abbott (Am. Ent. 

 Soc. coll.) is similar in coloring. Vulvar lamina like 

 that of Hagenii. Appendages as long as 9. Length 

 32.5, abd. 22, hind wing 27. The females of Hagenii 

 and didyma are to be distinguished by the former having 

 the abdomen robust and of nearly uniform wddth, each 

 spot on segments 2-6 one-fourth as wide as the dorsum 

 of the segment, while didyma ? has the abdomen slender, 

 widened somewhat at the base and before the apex, each 

 stripe on 3-6 one-eighth as wide as the dorsum of the 

 segment. 



Distribution. Mexico (Baja California as above), 

 Cuba, Isle of Pines, Hayti. 



35. MiCRATHYRiA Hagenii Kirby. PI. xvii, figs. 95- 

 97- ' 



M. H. Kirbj', Cat. Odou. p. 41, 1890. D>/themis didyma Hagen, 

 Syu. Neur. N. A. p. 165, 1861; Proc. Bost. Soc. N. H. xi, p. 

 292, 1868. Dythemts dicrota Hagen, Proc. Bost. Soc. N. H. 

 xviii, p. 75, 1875. 



