226 MESSRS. T. BLACKBURN AND P. CAMKRON ON THE 



joint of the antennae consists in little more than an emar- 

 gi nation, the apex of the joint being scarcely dentate. 

 The second ventral segment is not at all flattened, the 

 third scarcely, the fourth quite evidently so ; the remain- 

 ing segments are concave. The yellow bands on the hind 

 body are all entire, the basal one very broad, the second 

 narrow, the last broad. 



I have no doubt the yellow markings in this species are 

 subject to great variety, 



37. Crabro mauiensis. 



C. mauiensis, sp. nov. 5 . Subnitidus, pubescens, crebre 

 subtiliter punctatus, niger, flavo-ornatus ; clypeo 

 aureo-piloso ; alis hyalinis, infuscatis ; abdomine 

 nitido, in medio lato, vix evidenter punctato. 



Long. 9 millim. 



The yellow markings are as follows : — The basal two 

 thirds of the upper surface of the mandibles, the anterior 

 face of the basal joint of the antennae, the sides of the 

 prothorax and a spot near the tegulse, the postscutellum, 

 an interrupted band on the second dorsal segment of the 

 hind body, a band on the fourth segment, and a spot 

 on the fifth. The eyes are moderately facetted and not 

 strongly separated (as compared with other species), and 

 the forehead is strongly concave. The head is closely, 

 finely, and smoothly punctate. The punctuation of the 

 mesothorax is obscure, that of the scutellum and meta- 

 thorax extremely fine, these parts being, however, rather 

 strongly strigose longitudinally. The pubescence is 

 whitish, but there is not much of it in my specimen, 

 which is possibly abraded. 



Though this insect is closely allied to C. affinis, Smith, 

 the much smoother punctuation of the head, on which 



