138 CRABRONID^. 



CRABRONID.E. 



CRABRO. 



1. Crabro affinis. 



Female. Length 4| lines. — Black ; the abdomen shining and having 

 two yellow fasciae, the first interrupted. Head and thorax semi- 

 opaque, the former with the ocelli in a curve on the vertex ; the 

 basal half of the mandibles and the scape of the antennae in front 

 yellow ; the clypeus with a longitudinal carina, and thinly covered 

 with silvery pile. The mesothorax with two abbreviated longi- 

 tudinal ridges on the disk ; the scutellum obsoletely bituberculate ; 

 the metathorax with a central longitudinal channel ; wings sub- 

 hyaline, the nervures black ; the outer margin of the tegulae flavo- 

 testaceous. Abdomen with a slightly interrupted yellow fascia on 

 the basal margin of the second segment, and a narrow uninter- 

 rupted one near the basal margin of the fourth ; the apical margin 

 of the fifth segment narrowly flavo-testaceous, and fringed with 

 short white pubescence ; the sixth segment with a few scattered 

 punctures. 



Hah. The island of Kauai. 



This species was captured very sparingly. It resembles the C. 

 vagus of Europe, and belongs to the same division of the genus, 

 having the ocelli in a curve, the Solemus of St. Fargeau. 



2. Crabro mandibulars . 



Female. Length 5 lines. — Black, and slightly shining; the head 

 and thorax very closely and finely punctured, and having a few 

 yellow markings. The ocelli in a curve on the vertex ; the clypeus 

 and anterior margin of the face with bright golden-coloured pubes- 

 cence ; the scape of the antennae in front and the basal half of the 

 mandibles above yellow ; the cheeks with changeable silvery pile. 

 Thorax with a minute spot on the collar laterally, the tubercles, 

 and the postscutellum yellow ; the wings hyaline, the nervures 

 black ; the metathorax with a central longitudinal channel, and a 

 few short carinae at its extreme base, and without the usual en- 

 closed semicircular space at its base. Abdomen smooth and shining, 

 the three or four apical segments with short white pubescence; 

 the apical segment with the margins raised, shining, and with a 

 few strong punctures. 



Hah. Coasts of Maui. 



Taken on flowers on sandy coasts by the Rev. T. Blackburn. 



