HYMENOPTERA 103 



punctured. Mesothorax dull, with grey pubescence, and very shallow ill-defined 

 puncturation ; the scutellum with very similar sculpture ; propodeum with the anterior 

 area entirely dull, rugose to the brow. Abdomen dull, with rugulose surface ; the 

 first, second, and third segments with a short fringe of pale decumbent hairs, at least at 

 the sides, but these bands are very easily abraded; process of the eighth ventral 

 segment dilated, and densely clothed with long hairs on the ventral side, and the apical 

 bifurcation fringed. Wings clear in fresh specimens. 



Female, black, with the anterior tibiae testaceous in front. The face is wide across 

 the eyes, in certain positions appearing even transverse ; the apex of the clypeus 

 slightly emarginate ; head above the antennae quite dull, and shallowly punctured. 

 Mesothorax dull, with fine, indefinite punctures, these being very shallow, and the 

 general surface rugulose ; scutellum also dull and similarly punctured ; propodeum as 

 in the </. Abdomen dull, the apical margins of the segments widely pale, apical 

 segments with pale hairs ; front legs with the intermediate joints of the tarsi with 

 somewhat short hairs, quite different from the long, curved, and regularly disposed ones 

 of all the preceding species. 



Hab. Kilauea, Hawaii (4000 ft). Very rare. 1 took a c/' and ? in company in 

 December, 1896, and a single </ on each of two previous visits to the same locality. 

 The ? is somewhat abraded and shows no trace of lateral pubescent streaks, but I 

 suspect they would be present in a fresh example. 



Obs. This and the four following species are parasitic on certain of the species 

 already described. The females are easily known from those of the industrial forms by 

 the degeneration of the sweeping hairs on the front tarsi. The males however seem to 

 show no important points of distinction. 



(38) Nesoprosopis hilaris, Sm. 



Prosopis hilaris, Smith, J. Linn. Soc. xiv. p. 683. Blackburn and Cameron, 

 P. Manch. Soc. xxv. (1885-86), p. 147. 



Male, with the whole face below the antennae bright yellow, and this colouring 

 is produced above the line of insertion of the antennae broadly along the border of 

 the eyes ; mandibles ferruginous with a yellow line ; scape of the antennae yellow on 

 the anterior half of its dilated surface, fulvous on the posterior ; abdomen with the 

 basal segments ferruginous. Antennae with the scape dilated, evidently longer than 

 wide, but not nearly twice as long ; head above the antennae dull, somewhat rugosely 

 punctured. Mesothorax with grey pubescence, dull, and evenly punctured ; scutellum 



