io6 FAUNA HAWAIIENSIS 



propodeum, which is rugose right up to the brow, will generally distinguish it. The 

 % is black with the basal and more or less of the second segment of the abdomen 

 ferruginous ; the face is entirely black, the clypeus at the most showing a slight tinge 

 of obscure red; posterior and intermediate tibiae black or of an obscure colour. 



Hab. Hawaii, both sides of the island, at an elevation of 4000 ft. Parasitic on 

 N. difficilis and probably other species. 



Obs. The five parasitic species above described are extremely closely allied to 

 one another, but I believe them to be sufficiently distinct. They all agree in having 

 the vertex of the head somewhat incrassate, the scutellum closely and evenly punctured, 

 the propodeum rugose to the brow, and the head between the antennae and the vertex 

 with only an inconspicuous pubescence, the latter character being characteristic of the 

 blackbicrni group of non-parasitic species, to which I believe these are closely allied. 

 The males (except N. inqitiliiia) all have the scape similarly formed ; the females 

 have the apex of the clypeus distinctly emarginate, and the sweeping hairs of the 

 anterior tarsi in an evidently degraded condition. 



(42) Nesoprosopis fuscipennis. 



Prosopis /uscipennis. Smith, J. Linn. Soc. xiv. p. 682. Blackburn and Cameron, 

 P. Manch. Soc. xxv. (1885-86), p. 140. 



A very large species, the </ with the face black, deeply depressed along the eyes, 

 the depressions dull ; clypeus with shallow punctures, and a few hairs along the apical 

 margin. Scape of the antennae strongly dilated, closely and finely punctured, both 

 front and hind margins rounded, the latter much the more strongly, the former with 

 a white line, seen from in front the front margin is very strongly arcuate beneath ; 

 head above the antennae with shallow punctures. Prothorax with a whitish band 

 posteriorly ; mesothorax dull and punctured, the punctures slightly wider apart and 

 larger posteriorly ; scutellum with larger and less shallow punctures, depressed from 

 the sides to the middle line ; propodeum with the anterior area more or less strongly 

 irregularly rugose. Legs with the apical joints of the tarsi usually clear testaceous, 

 sometimes however entirely obscure ; posterior tibiae with a white line beneath at the 

 base, the posterior metatarsi also generally with a short basal streak, but this is 

 sometimes absent. Basal segment of the abdomen with scattered punctures, second 

 and following with very distinct though shallow puncturation ; beneath shining, rather 

 largely and shallowly punctured. 



Female, very like the d", apart from sexual differences. The prothorax is similarly 

 banded, and the posterior legs are marked in the same way ; the tarsi are often without 



