240 Descriptions and liecords of Bees. 



hair (no Llack), tlie second with pale oclireous bands at sides, 

 the third with simiLar bands less widely interrupted, the 

 fourth with an entire pale band, the fifth covered with pale 

 reddish hair, the sixth witli creamy appressed hair ; keel ot 

 sixth segment broadly rounded, the margin irregularly sub- 

 crenate but not dentate, the central emargination moderate ; 

 no ventral spines. 



Carcarana, Argentina {L. Bruner, •14). U.S. National 

 Museum. 



In the tables of Jorgensen and Schrottky it runs nearest to 

 M. porsonsice, from which it differs by the small coxal spines, 

 non-dentate end of abdomen, &c. It runs out at 13 in 

 Yachal's table, and in Friese's Argentine table it goes to 

 "Ji. siniiIlima"=^parsonsice. It is related to M. para- 

 scanthura, Ckll., but differs in the distribution of the hair on 

 tlie abdomen and the dark spurs. Other species of Megachile 

 taken by Bruner at Carcarana are M. injima, Vachal (69) ; 

 M. ctenopJiora, Holmbg., apparently (70); M. gomphrence, 

 liolmbg., apparently (45) ; 21. vagafa, Vaciial (43) ; J/, men- 

 dozana, Ckll. (63). The Megachile fauna of Argentina is 

 very large, and as many of the species have been briefly 

 described and many are known only from one sex, the deter- 

 mination of the species is more or less difficult and uncertain. 

 The species must be quite local in many cases; thus, Yachal 

 described nine species from the Province of Mendoza, and 

 Joigensen subsequently reported twenty species from that 

 province, but did not meet with any of YachaFs. 



- Xylocopa frontalis nitens (Lepeletier). 



A2?is morio, Fabr., 1793, is preoccupied by Ap)is morio, 

 Swed., 1787 ; the insect consequently takes the name nitens 

 {Xylocopa nitens, Lep., 1841). 



Agapostemon heteriirus, sp. u. 



$ . — Length about 10 mm. : anterior wing 7*8 mm. 



Head and thoiax a rather bluish green, the strongly striate 

 cheeks steel-blue ; face broad, eyes emarginate; mandibles 

 pale yellow basally ; clypeus black except basally, convex, 

 punctured, with a deep median sulcus; supraclypeal area 

 varying from brassy to bluish ; flagellum ferruginous 

 beneath ; niesothorax and scutellum covered with short, felt- 

 like, ferruginous hair; base of metathorax coarsely wrinkled, 

 tiie triangular area distinguishable ; posterior face coarsely 

 transversel}^ grooved ; tegulse reddish brown. Wings dusky, 

 especially at apex; first r. n. joining second s.m. about 



