Sept., 1917-] CoCKERELL: COLLECTING BeES IN SOUTHERN TexAS. 191 



Exomalopsis zexmeniae Cockerell. 



Point Isabel, one female at yellow composite. Described from 

 Guatemala; new to the United States. 



Diadasia australis rinconis (Cockerell). 



Point Isabel, many females at yellow composite; San Benito and 

 between San Benito and Point Isabel, several females at flowers of 

 cactus; San Benito, two found by Jack Cowgill on Argcmonc. De- 

 scribed from New Mexico. 



Melissodes masuca Cockerell. 



Point Isabel, six females at yellow composite; between San Benito 

 and Point Isabel, both sexes at cactus; San Benito, male at Parkin- 

 sonia aculeate, female at Phlox. This was described from the male, 

 and the female was unrecorded. I find I have a female, labelled " M. 

 galvestonensis, variety," taken May 8 at Fedor, Texas, by Birkmann. 

 The female runs in my tables to galvestonensis, except that there is a 

 little dark hair on scutellum, easily overlooked. There is black hair 

 on vertex. The male is quite distinct from galvestonensis. 



Xenoglossodes wilmattse new species. 



5. Length about 9 mm. Like X. gutierresice Ckll., but yellow band on 

 clypeus much narrower, hardly broader than the apical red band ; thorax above 

 with dense, silky, reddish-ochreous hair, a broad suffused band between wings 

 brownish ; tegulae rufous, blackish on disc ; marginal cell longer and more 

 slender; apical plate of abdomen broader, rounded at end, finely transversely 

 striate. It may also be compared with Melissodes spissa Cresson, but is dis- 

 tinguished from that by being smaller, and by the yellow band on the densely 

 white-haired clypeus. 



Point Isabel, at yellow composite (W. P. Cockerell). 



Lithurgus apicalis littoralis new subspecies. 



(^. A little over 10 mm. long; pubescence tinged with ochreous ; flagellum 

 very dark reddish beneath ; abdominal hair-bands slightly ochreous ; segments 

 2 to 5, before the bands, and 6 with pure black hair; spurs of hind legs red- 

 dish. Perhaps a distinct species. 



Point Isabel, at yellow composite (IV. P. Cockerell). 



Megachile montivaga Cresson. 



Point Isabel, one female at yellow composite. 



Megachile parallela Smith. 



Point Isabel, one female at yellow composite. 



