of Fossorial Hymenoptera. 447 



the posterior margin of the protliorax arcuate; the tarsi 

 obscure ferruginous ; the nervures of the wings nearly black ; 

 the wings iridescent. Abdomen petiolated ; the apical margin 

 of the second and following segments narrowly testaceous. 

 Hah. Para. 



Agenia cmrideocepluda. 



Female. Length 5 lines. Head and thorax blue, exhibiting 

 tints of purple, green, and violet in certain lights ; abdomen 

 ferruginous. Head purple, covered with silvery pile below 

 the insertion of the antennae ; the mandibles, palpi, and scape 

 of the antennfe beneath pale testaceous ; the flagellum fulvous 

 beneath. Thorax : the posterior margin of the protliorax 

 subangular, and bordered with silvery pile ; the sides of the 

 thorax silvery ; the metathorax with a central longitudinal 

 impressed line, which widens towards the apex ; wings hyaline 

 and iridescent, the nervures ferruginous ; legs ferruginous. 

 Abdomen petiolated ; the base of the petiole blue. 



Hah. Pai'a; St. Paulo. 



Agenia deceptor. 



Female. Length 4 lines. Pale ferruginous, abdomen darkest, 

 with the vertex and thorax above dark fuscous. Head : 

 above the insertion of the antennaj nigro-seneous, and witli a 

 pale stripe at the margin of the eyes ; the apical half of the 

 antennjB fuscous above. Thorax : the posterior margin of 

 the protliorax arcuate, and bordered with a pale ferruginous 

 band ; the postscutellum, tegula3, and apex of the metathorax 

 pale ferruginous ; wings hyaline, the superior pair with their 

 anterior margin slightly fuscous. Abdomen petiolated. 



Hah. Para. 



Agenia timida. 



Male. Length 3^ lines. Head and thorax blue ; abdomen 

 black, with the petiole ferruginous. Head wider than tlie 

 thorax ; the face and clypeus silvery ; the margins of the 

 clypeus, apex of the mandibles, palpi, inner orbits of the eyes 

 not as high as their vertex, and the scape of the antennae in 

 front very pale ferruginous. The posterior margin of the 

 prothorax arcuate ; the metathorax Avith a central longitudinal 

 depression, and the sides with silvery pubescence ; wings 

 hyaline and iridescent, the nervures and tegulte testaceous ; 

 the legs ferruginous, the apical joints of the anterior and in- 

 termediate pairs, and the posterior pair entirely, as well as the 

 apex of the tibise, fuscous. Abdomen : the petiole and basal 



