684i OS NEW SPECIES OF ACULEATE HYMENOPTEEA. 



nous; the metatliorax finely rugnlose, opaque, and witli a few 

 short striae at the base ; wings subhyaline, iridescent, and faintly 

 clouded at their apex. Abdomen smooth and shining ; the apical 

 margin of the second segment, and the following segments, black. 



Sah, Island of Kauai. 



Taken sparingly on flowers. (T. J3.) 



Pam. ApiDiE. 



Megaciiile diligens, n. sp. Female. Length 4 J lines. Black ; 

 the pubescence on the head and thorax obscure pale fulvous, be- 

 coming cinereous on the metathorax and on the face anteriorly ; 

 the abdomen with ferruginous pubescent fasciae. Head — the 

 mandibles with four teeth, the two apical ones acute, the others 

 blunt ; the cheeks with long cinereous pubescence ; the legs with 

 a little short black pubescence above, on the tarsi beneath it is 

 reddish brown ; the claws ferruginous, tipped with black; wings 

 subhyaline, the nervures black. Abdomen cordate, and densely 

 clothed with bright ferruginous pubescence beneath. 



Male. Eather smaller than the female, but very closely resem- 

 bling it. Differs in having the clypeus densely covered with very 

 pale fulvous pubescence ; the anterior tarsi fringed behind with 

 pale pubescence ; the fifth and sixth segments of the abdomen 

 densely clothed above with short ferruginous pubescence ; the 

 sixth segment deeply emarginate, forming two blunt apical teeth. 



Hah. Honolulu. 



Not rare ; forming nests of leaves of a species of Acacia rolled 

 up into cylindrical cells, which are joined one at the end of another 

 to the length of several inches, and are placed in crevices of 

 masonry. (T. B.) 



Xtlocopa jiiNEiPENNis, Dg Geer, Mem. iii. p. 573, tab. 28. 

 fig. 8, $ ; St. Farg. Hym. ii. p. 186, $ . 



The male is ferruginous and clothed with fulvous pubescence ; 

 the mandibles black, with a pale spot at their base ; the scape of 

 the antennae above and the second joint of the flagellum black. 

 Thorax black beneath ; the anterior trochanters black, with a 

 pale ferruginous spine beneath ; the intermediate and posterior 

 coxaj and trochanters, and also the femora, black ; wings flavo- 

 hyaline, with ferruginous nervures. The apex of the abdomen 

 pubescent in the form of two dense tufts. 



Hal. Honolulu. Mexico ; Peru ; South America ; Brazil. 



