HTMENOPTEEA FEOM THE SANDWICH ISLANDS. G77 



margins of the segments with fasciae of fine silvery pubescent 

 pile, which are very brilliant in certain lights, and which are 

 widened laterally. 



The male ovAj differs in being smaller and in having an addi- 

 tional joint in the antennae and an extra segment to ihe abdomen. 

 A common but not abundant species ; it was taken in the 

 islands of Oahu, Kauai, and Maui. Mr. Blackburn says that he 

 has bred this species from the same collection of cells as those 

 which produced species of Pelojpoeus and of Crahro. This obser- 

 vation appears to indicate the habit of the genus to be parasitic ; 

 but this cannot be the case, their economy having been observed 

 and published by Mr. Home in the seventh volume of the Trans- 

 actions of the Zoological Society. The species construct cells of 

 mud, which they provision with spiders, the food of their young 

 brood. The genus Crabro usually provisions its cells with Dip- 

 tera. 



Fam. CfiABEOiiriDjs. 

 Ceabeo aeeinis, n. sp. Female. Length 4| lines. Black ; the 

 abdomen shining, and having two yellow fasciae, the first inter- 

 rupted. Head and thorax semiopaque ; 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 longi- 

 tudinal carina, and thinly covered with silvery pile. Thorax — 

 the mesothorax with two abbreviated longitudinal ridges on the 

 disk; the scutellum obsoletely bituberculate ; the metathorax 

 with a central longitudinal channel ; wings subhyaline, the ner- 

 vures 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 uninterrupted 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 punc- 

 tures. 



Hal}. 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 Solemts of St. Eargeau. 



Ceabeo mandibtjlaeis, n. sp. Female. Length 5 lines. 

 Black, and slightly shining ; the head and thorax very closely and 

 finely punctured, and having a few yellow markings. Head — the 

 ocelli in a curve on the vertex ; the clypeus and anterior margin 



