94 FAUNA HAWAIIENSIS 



and the apical margin of the clypeus is yellow. The scutellum is perhaps hardly so 

 dull as in N, dwnetorum, but more so than that of N. mutata. Besides the line on 

 the clypeus there is a long and rather broad yellow line along the inner margin of 

 the eyes ; the posterior margin of the prothorax at the sides, the tubercles, and the 

 base of the posterior and intermediate tibiae are also marked with yellow ; the clypeus 

 is less convex longitudinally than that of N'. diimdoriun. 



Hab. Hawaii ; very rare, a single specimen only taken at Kilauea. 



(25) Nesoprosopis crabronoides, sp. nov. 



% nigra, angustula, capite supra antennas subnitido, dense distincteque punctato, 

 vertice fortissime incrassato ; mesonoto et scutello opacis, subtilissime punctatis. Caput 

 prae antennis maculis duabus flavis lateralibus ornatum, pronoti margine postico ad 

 latera, tuberculis, basique tibiarum, flavo-notatis. Long. 4-5 — 5 mm. (Plate II. fig. 

 2 and 2 a.) 



Female, narrow and elongate, the face with two yellow lateral spots, and some- 

 times an obscure one near the apex of the clypeus ; an interrupted line on the 

 prothorax posteriorly, the tubercles, and the base of the tibiae, also yellow ; head 

 with the vertex extraordinarily incrassate, the face exceedingly strongly convex lon- 

 gitudinally, distinctly punctured behind the antennae, the surface between the punc- 

 tures shining, as also the smooth spaces adjoining the exterior ocelli. Mesothorax 

 very dull and finely punctured, clothed with short pubescence, scutellum with fine 

 sparse puncturation ; propodeum shortly rugose at the extreme front of its anterior 

 area, which otherwise is very finely rugulose and shining : abdomen narrow and sub- 

 elongate. 



Hab. Kilauea, Hawaii (4000 ft.) : rare. 



This minute and remarkable species cannot be confounded with any other of the 

 Hawaiian bees known to me. Its resemblance, when on the wing, to a minute 

 species of Crabro is very great. A few burrows were found in the hard trunk of 

 a large dead tree, which was still standing. Though I visited this tree on many 

 occasions I took but few specimens — all females — the males neither coming to the 

 burrows, nor visiting the flowers in the immediate vicinity. 



(26) Nesoprosopis matiiensis, sp. nov. 



N. nmtatae simillima ; </ clypeo nigro ; extra hunc flavis duabus maculis ; pro- 

 noto, tuberculis, tibiisque posticis haud flavo-notatis ; capite supra antennas subrugose 

 punctato ; antennarum articulo primo fortius dilatato, margine antico subtus distincte 

 arcuato ; ? capite juxta oculos et margine postico pronoti ad latera, flavo-lineatis ; 

 tuberculis, tibiisque posticis haud flavo-notatis; scutello opaco. Long. 575 mm. 



