24 FAUNA HAWAIIENSIS 



(13) Crabro {Solenius) atripennis, sp. nov. 



Praecedenti forma facieque simillimus, mandibulis antennarumque articulo basali 

 albescentibus facile distinguendus. d"?. Long. 8 — 13 mm. 



Very like the preceding in form and sculpture, but in neither sex is the mesothorax 

 posteriorly as smooth, nor is the surface in that region at all shining. The calcaria of 

 the posterior tibiae are darker, and the front of the scape of the antennae and the 

 mandibles are yellowish-white. Wings deeply infuscate and with a steely iridescence, 

 and the sixth joint of the antennae but little produced at the apex, as in the preceding 

 species. 



Hab. Common generally on Hawaii from the lowlands to an elevation of 5000 ft. 

 Preys on Tachinids, and also sometimes enters houses and carries off the introduced 

 house-fly. 



(14) Crabro {Soleniics) curtipes, sp. nov. 



Niger, alls infuscatis, antennarum articulo sexto baud fortiter dentato, clypeo 

 argenteo- vel pallidissime aureo-piloso, abdominis segmento primo pubescentia longa 

 nigraque vestito, segmento 2 ventrali subdepresso, dense punctato, segmentis caeteris 

 peropacis et depressis. ^. Long. 6 — 11 mm. (Plate L fig. 9.) 



Male black, the wings infuscate and with little iridescence. Head, thorax, and 

 basal segment of the abdomen with erect dark pubescence, clypeus with silvery, or 

 faintly golden, appressed hairs. Antennae with the fifth joint of the flagellum of the 

 antennae emarginate beneath, but little produced at its apex. Head very densely 

 rugosely punctured in front, less so on the vertex posteriorly. Mesothorax dull, 

 rugosely punctured. Propodeum with excessively short wrinkles at its anterior margin, 

 behind these with shallow subobsolete punctures. Abdomen with the basal segment 

 extremely finely punctured, and clothed with long dark hairs ; second and following 

 finely closely and evenly punctured. Beneath, the second segment is flattened, closely 

 punctured, and inclined, the third flattened or slightly depressed and inclined in the 

 opposite direction to the second, so that the two meet at an obtuse angle. The 

 surface of the third and of all the following (which are depressed) is very dull, having 

 an appearance of granulation or dense puncturation, which is due to a dense meshwork of 

 raised lines. Posterior tarsi very short in proportion to the tibiae, all the joints taken 

 together hardly being equal to the latter in length. 



Hab. Kona, Hawaii, about 4000 ft. ; i c/, Aug. 1892. Olaa (2000 ft.), and 

 Kilauea (4000 ft.), several i^ in 1896. I do not know the ? of this remarkable 

 species, which might well form a distinct genus, should the other sex present any 

 striking characters. 



