HYMENOPTERA OF THE HAWAIIAN ISLANDS. 231 



concavity (feeble as a whole) commencing at the fourth 

 segment^ but being deepened near the middle of each 

 individual segment. In the female the penultimate dorsal 

 segment of the hind body is densely punctured and set 

 with close red pubescence. I think^ too^ that the surface 

 of the segment itself is reddish. The wings are almost 

 absolutely devoid of colour in both sexes. 

 Hab. Oahu. 



44. Crabro adspectans. 



C. adspectans, sp. nov. Subnitidus_, pubescens, distincte 



minus crebre punctatus, niger, flavo ornatus ; tibiis 



anticis rufo-hirsutis ; alis inf uscatis ; abdomine pube- 



scentij nitido, in medio lato^ vix evidenter punctate. 



(^ . Antennarum articulo sexto dentato^ abdominis seg- 



mentis duobus ultimis supra rufo-pubescentibus. 

 $ . Abdominis segmento penultimo supra dense rufo- 



hirsuto. 

 Long. 12 millim. 



The yellow markings are placed on the prothorax, scu- 

 tellum^ and postscutellum (in the female there is a large 

 yellow spot on the second ventral segment of the hind 

 body) ; they are much less conspicuous (judging by my 

 specimens) in the male than in the female^ but are pro- 

 bably subject to variation in both sexes. The head is 

 shining and very distinctly punctured, the punctures being 

 rather crowded behind the base of the antennae and 

 becoming gradually more sparing backwards ; the meso- 

 thorax is shining and is distinctly and evenly punctured ; 

 the punctuation of the metathorax is rather coarse. The 

 hind body is quite shining, but its brightness is hidden by 

 close short whitish pubescence. In the male the apical 

 half of the penultimate, and the whole of the apical seg- 

 ment, are rather densely covered with rather long golden- 



