HYMENOPTERA 



95 



Male, with only a line bordering the inner margins of the eyes yellow, the 

 clypeus, prothorax, tubercles and hind tibiae black ; antennae with the scape rather 

 more dilated than the other small and narrow species, its anterior apical angle 

 somewhat prominent, and bent downwards, the front margin distinctly arched be- 

 neath ; head above the antennae clothed with long sparse pubescence, and having an 

 area about the middle of a deeper black than the general surface, but less distinctly 

 marked than that of A^. dumetorum ; in front of this are two smooth spaces corre- 

 sponding in shape to the dilated scape. Mesothorax and scutellum dull, with very 

 minute punctures ; propodeum at its anterior margin with extremely short rugosity, 

 behind which the anterior area is smooth except for the fine surface rugulosity, and 

 slightly shining ; 8th ventral segment of the abdomen with the process and its 

 apical bifurcations dilated. 



Female, with a narrow yellow line along the margins of the eyes, and one on 

 each side of the hind margin of the prothorax yellow ; head above the antennae 

 with the surface shining (except narrowly in the middle), finely and closely punc- 

 tured ; mesothorax dull, and very finely punctured ; scutellum also dull, finely and 

 somewhat remotely punctured ; anterior area of the propodeum with only the fine 

 general surface rugulosity and shining in certain aspects ; wings clear and iridescent. 



This species may be known from its ally on Kauai by the more dilated scape 

 of the antennae, the entirely black clypeus, and different sculpture above the antennae 

 of the </ ; the ? by the dull scutellum, and the more shining and more distinctly 

 punctured head above the antennae ; from N. dumetorum the distinctly arched an- 

 terior margin of the scape of the antennae beneath will distinguish the <^ , the black 

 legs and tubercles the % . 



Hab. Haleakala, Maui {5000 ft). A pair (cf and ?) were dug out of a burrow, 

 which was made in a very hard tree trunk, in April 1894. Subsequent visits in 

 1895 ^'^^ 1896 failed to produce further specimens. 



(27) Nesoprosopis angustula, sp. nov. 



Nigra, N. dumetoru^n cognatissima, antennis ejusdem formae ; c/* frontis plaga 

 pernigra vix distincta ; ? capite tibiisque posticis nigris, baud flavo-notatis, illo 

 supra antennas subnitido, distingue nda. Long. 5 — 6 mm. 



Very close to N'. diimetornjii, the c/ with the scape of the antennae similarly 

 formed. Male with a yellow spot at the apex of the clypeus, and a well-marked 

 triangular one along the inner margin of each eye ; tubercles, posterior and inter- 

 mediate tibiae and tarsi, black ; head above the antennae very densely punctured about 

 the middle, where there is no very distinct deep-black area, differing greatly from the 

 surrounding sculpture. In A^. dumetorum on close examination that area is found to 



