HYMKNOPTERA. 87 



4. Agapostemon pulchra, n. s. B.M. 



Female. Length 4 lines. — Entirely of bright golden-green, 

 the head and thorax finely roughened with confluent punctiu-es, 

 and thinly covered with griseous pubescence, most dense on the 

 sides of the metathorax ; the wings hyaline, nervures and tegulae 

 testaceous ; base of the metathorax rugose, truncate ; legs rufo- 

 testaceous, covered with a griseous pubescence, the tai'si beneath 

 with fulvous. Abdomen finely and closely pimctured, the mar- 

 gins of the segments depressed ; sides of the abdomen covered 

 with long griseous pubescence, the apex dark fuscous. 



Obs. This species closely resembles A. ceruginosus, but is uni- 

 formly of a smaller size, its wings are hyaline, and the abdomen 

 is not tinged with blue. 

 Hab. North America; California. 



5. Agapostemon rhopalocera, n. s. 



Male. Length 3i lines. — Head and thorax golden-green, 

 covered with minute confluent punctures, the face, cheeks and 

 sides of the thorax thickly covered with pale yellow pubescence ; 

 the scape in front, the labrum and mandibles yellow, the flagel- 

 lum beneath pale fulvous ; antennae longer than the head and 

 thorax, the two apical joints clavate, the inner margin of the 

 club being sharp or carinate ; above the four or five basal joints 

 have more or less of a fuscous stain, the club black, the inter- 

 mediate joints ferruginous ; the tegulae, extreme base of the 

 wings and stigma yellow ; the legs yellow, the base of the femora 

 and knees more or less ferruginous, posterior coxae green 

 above. Abdomen black above, yellow beneath, on the middle of 

 the basal segment and at the base of the second and third a trans- 

 verse yellow band, scarcely visible at the base of the fourth seg- 

 ment, the extreme apex yellow. 

 Hab. Mexico. (Coll. Y. Smith.) 



6. Agapostemon nasutus, n. s. B.M. 



Male. Length 3i lines. — Head and thorax golden-green, 

 covered with minute confluent pimctiu-es, the antennae as long 

 as the head and thorax, the scape yellow in front, the flagellum 

 pale fulvous beneath, the anterior margin of the cljiieus bent 

 under, notched in the middle, very pale testaceous, rounded on 

 each side ; the labrum and mandibles yellow, the latter fernigi- 

 nous at their apex. Wings hyaline, the tegulae, extreme base of 

 the wings and the stigma yellow ; base of the metathorax rugose ; 

 legs yellow, the intermediate and posterior coxae, trochanters and 

 base of the femora black. Abdomen black, on the middle of the 



