22 CALIFORNIA ACADEMY OF SCIENCES. 



the aenifennis DeG. San Jose del Cabo, L. Cal. {Eiscn). 

 Twenty females, nineteen males. 



Xylocopa varipunctata Patt. Five females, two 

 males. This species is closely allied to the West Indian 

 X. ciibcecola, but is larger, the vertex is more closely 

 punctured and the wings of the female are darker. The 

 3 is as in ciibcecola entirely fulvous. San Jose del Cabo 

 {Eiseii) and Comondu {Haines), March. 



Centris lanosa Cress. San Jose del Cabo {Eisoi), 

 Calmalli Mines, April and Calamujuet, May {Haines), 

 and Hermosillo, Sonora {Eisen) April. This species is 

 very likely identical with C. mexicana Sm. 



Centris sp. A male specimen from San Jose del 

 Cabo, L. Cal. {Eisen), which is evidently a new species, 

 but unfortunately is too poor for describing, having been 

 in alcohol. The whole insect is covered with a dense 

 ashy-grey pubescence. 



Centris Eisenii n. sp. 



? . — Black : a transverse mark on anterior part of 

 clypeus, from the middle of which there extends a line 

 nearly to the base of clypeus, sides of face, labrum and 

 spot at base of mandibles, whitish-yellow; flagellum be- 

 neath except first joint, testaceous ; front and cheeks 

 clothed with whitish pubescence, that on the vertex a very 

 dark brown ; dorsulum and scutellum with a brownish- 

 yellow pubescence, darkest on anterior part of dorsulum; 

 the thorax on sides and beneath with pubescence similar 

 to that on the cheeks; the four anterior legs clothed 

 with a short brown pubescence in front, behind with 

 long whitish pubescence; scopa of posterior legs darker 

 than the pubescence on sides of thorax and much paler 

 than that on the dorsulum; abdomen above sparsely 

 clothed with a short black pubescence, the second, third, 



