5IO CALIFORNIA ACADEMY OF SCiENCKS. 



1? Sau Kaymuudo, April, 1889, C. D. Haiues. 



3 ? 1 Sierra El Taste, September, 1893, G. Eiseu. 



11 4 Sau Jose del Cabo, September, 1893, G. Eisen. 



50 27 Sau Jose del Cabo, October, 1893, G. Eiseu. 



11 2 Mesa Verde, October, 1893, G. Eiseu. 



1 Sierra Laguua, 2000 feet, October, 1893, G. Eiseu. 



2 Miraflores, September, 1894, Eisen & Vaslit. 



1 Sierra Sau Lazaro, September, 1894, Eiseu & Vaslit. 



3 2 Sau Jose del Cabo, September, 1894, Eiseu & Vaslit. 



82 3 37? 



Of III specimens, only 3 have more than one mar- 

 ginal cell between the upper sector of the triangle* and 

 the external branch of the lower sector on the hind wings 

 (see characters of the genera, mite), viz.: i ,5 and the 

 left wing only of another ^ have two marginal cells, while 

 the third 6 has 3 marginal cells on the right wing, 4 on 

 the left. However, specimens are not rare in which two 

 rows of cells exist between the two veins mentioned to 

 within two cells of the margin. 



Front wings with discoidal triangle 3-7-celled (usually 

 6), 4—6 median cross-veins not forming an internal tri- 

 angle, 1—4 supratriangulars, first and fifth, sixth, seventh 

 or eighth antecubitals thicker. Hind wing with discoidal 

 triangle 3-6-celled (usually 5), 3-4 median cross-veins 

 not forming an internal triangle, 1-3 supratriangulars, 

 first and fifth or sixth antecubitals thicker. 



Abdomen 6 53-5-56, ? 52-56. Hind wing 46.5-56, ? 



48-56. 



Distribution. Quebec and Alaska to the West Indies 

 and Costa Rica, Sandwich Islands, Kamtschatka, China. 



20. Anax Walsinghami McLachlan. PI. xv, figs. 

 17, 18. 



* By my own error, the mauuscript furnished to the printer omits the 

 important words "of the triaug;le " after "External branch of lower sec- 

 tor" in the third line of the characters of the genus Anax given on page 

 471.— P. P.C. 



