jo^ FAUNA HAWAIIENSIS 



with similar sculpture ; propodeum rugose to the brow ; apical segments of the abdomen 

 with narrow fasciae of white pubescence along their apical margins ; all the tibiae and 



tarsi fulvous. 



Female, like the c/ in sculpture, cheeks, clypeus and the face at the sides, as well 

 as the antennae, more or less red ; the clypeus distinctly emarginate at its apex ; the 

 face wide across the eyes ; intermediate tibiae almost entirely pale, their apex only 

 narrowly fuscous, the posterior widely pale at the base, their apical half generally more 

 or less fuscous ; the intermediate and posterior trochanters both red or pale ; wings 

 in both sexes clear. Length, 5 — 8 mm. 



Hab. The sandy Isthmus between Ea.st and West Maui ; also found on the 

 coast of Lanai at Manele. In both cases the closely allied species N. volatilis Sm. 

 is found with it, but apparently that species alone frequents the neighbouring island 

 of Molokai, as the present species was not found there. N. volatilis extends its range 

 far up the mountains— as high as eight or nine thousand feet — but N. hilaris is confined 

 to sandy localities near the coast. Individuals vary greatly in size ; on Maui the small 

 examples breed in the cells of A", blackburni and probably of N. antkracina, the large 

 ones in the cells of N. assimulans. The delicate fringe of white pubescence on the 

 apical margins of the apical segments is very easily destroyed, but the present species 

 could easily be distinguished from N'. volatilis by this character, as they flew together 

 over the sand. 



(39) Nesoprosopis hostilis, sp. nov. 



Praecedenti forma et colore simillima ; segmentis abdominis apicalibus pubescentia 

 haud fasciatis ; </ articulo primo antennarum antice pallido, postice nigro ; tibiis posteri- 

 oribus et intermediis basi anguste pallidis ; ? capite flavis duabus maculis juxta oculos 

 ornato, tibiis posterioribus basi anguste flavis distinguenda. Long. 5 — 6 mm. (Plate 

 II. fig. 4, also fig. 20 — 20b.) 



Very closely allied to the preceding species, from which it seems hardly to differ 

 in sculpture, although it is a rather more shining insect than any of the other parasitic 

 species. 



Male, with the face coloured as in A\ hilaris, the yellow markings being produced 

 behind the antennae rather broadly along the borders of the eyes; mandibles without 

 a yellow line ; scape of the antennae with the upper surface pale only on its anterior 

 part, the posterior being black or nearly so ; intermediate and posterior tibiae dark, 

 pale at the base outwardly for only a short distance. 



Female, with a yellow (generally triangular) spot on each side of the face, surrounded 

 by reddish colour, with which they gradually become blended ; the legs coloured much 

 as in the </. The range of colour in the ? is quite different from that of the allied 



