of Fossorial Hymenoptera. 103 



of the antennaj and a line at the base of the mandibles yellow, 

 the latter otherwise ferruginous ; the flagellum fulvous. 

 Thorax : the collar, tegulas, two ovate spots on the scutellum 

 laterally, and a line united to them, running up to its base, as 

 well as the postscutellum, yellow ; the legs yellow, with the 

 posterior femora rufo-testaceous ; wings hyaline and iridescent, 

 with the nervures fusco-ferruginous. Abdomen : an ovate 

 yellow spot on the second, third, and fourth segments laterally, 

 close to the outer margins. 

 Hob. Para. 



Crabro carinatus. 



Female. Length 4 lines. Black ; head and thorax marked 

 with yellow ; abdomen fasciated with the same. Head large, 

 subquadrate above, and rather wider than the thorax ; ocelli 

 in a curve ; the clypeus with silvery pubescence, and the cheeks 

 with bright, changeable, silvery pile ; the scape of the antennse 

 and a line at the base of the mandibles yellow. Thorax : the 

 collar, tubercles, a line at the base of the scutellum, the post- 

 scutellum, and all the tibiae in front yellow ; the legs sometimes 

 rufo-piceous ; the mesothorax with two elevated abbreviated 

 carina3 on the disk anteriorly j the disk rugose ; the meta- 

 thorax with a deep, central, longitudinal channel ; the en- 

 closed space at its base obliquely rugose ; the truncation with 

 shallow, transverse, coarse stria3 ; wings flavo-hyaline, the 

 nervures pale ferruginous. Abdomen : the first segment 

 strongly punctured, the second less strongly so, the following 

 impunctate ; the segments margined posteriorly, and with 

 broad yellow fasciae, which extend over the margination ; the 

 first segment without a fascia ; the ajjical segment yellow and 

 canaliculated. 



Hah. St. Paulo ; Ega. 



Crabro sculpturatus. 



Female. Length 5 j- lines. Black ; the scape of the an- 

 tenna, scutellum, postscutellum, and legs beneath yellow. 

 Head as wide as the thorax ; ocelli in a triangle ; coarsely 

 rugose with confluent punctures ; clypeus sharply carinate 

 and densely covered with silvery pubescence. The anterior 

 margin of the prothorax elevated into a sharp carina, which 

 terminates laterally in an acute tooth ; the anterior portion of 

 the mesothorax, before the insertion of the wings, coarsely 

 sculptured with divergent striaj or grooves ; the posterior 

 portion with oblong longitudinal punctures disposed in rows • 

 the raetathorax with a coarse reticulation, composed of large 

 sliallow punctures ; at the sides it has an oblique coarse stria- 



