HYMENOPTERA FROM LOWER CALIFORNIA. 25 



the clypeus and labrum is yellowish; pubescence on legs 

 vei\v short when compared to the other sex; sixth dorsal 

 abdominal segment armed with a large tooth on each ex- 

 treme side, the seventh dorsal large, subquadrate, its sides 

 contracted, and with two strong, widely separated and 

 slightly converging ridges, which extend from the base 

 to near apex, the latter is slightly reflexed and black, the 

 last ventral segment is depressed on each side, the de- 

 pressions bounded outwardly by an oblique ridge, near 

 the apex of this segment there are two widely separated 

 tubercles, which are sometimes connected with the oblique 

 ridges which margin the lateral depressions. Length. 

 18 mm. 



San Jose del Cabo, L. Cal. {Eisen). One ? and eight 

 $> specimens. 



ExoMALOPSis PULCHELLA Cress. One female speci- 

 men, that seems to be this West Indian species. 



