620 FAUNA HAWAIIENSIS 



similar powers the rugosity of the basal abdominal segment and the transverse costate 

 impression at the base of the second can easily be seen, but under a strong lens the 

 sculpture is seen with difficulty. 



The antennal club may be said to be four-jointed, since the seventh joint of the 

 antennae is notably smaller than the eighth, though likewise notably larger than the 

 sixth ; the pedicel is ovate or obconical, and much wider and also longer than the third 

 antennal joint, which is elongate and about twice as long as wide, the third does not 

 differ much in length from the second, the penultimate joint is about as long as its 

 greatest width. The cilia of the front wings are rather long, the longest being about 

 half the length of the width of the wings, where widest. Abdomen narrow, elongate 

 and subparallel-sided. Length % '8 mm. 



The male has filiform-moniliform antennae, the pedicel and first funicle joint about 

 equal, the latter, in one aspect, more than usually wide, with the sides rounded, subequal 

 in length to the next, which is narrower, the apical joint pointed, and one and a half 

 times as long as the preceding. 



This species is remarkable for its narrow elongate form. 



Hab. Hawaii ; Kilauea. 



Subfam. BAEINAE. 

 The two following species do not agree with the subfamily characters, as given by 

 Ashmead, since they possess a quite distinct postmarginal vein. They are easily 

 separated from each other as follows : 



1 (2). Abdomen petiolate, posterior ocelli close to the eye-margins Pseudobaeus. 



2 (i). Abdomen sessile, posterior ocelli very remote from the eye-margins Dyscritobaeus. 



These insects are certainly introduced ; they are found in gardens in Honolulu, in 

 company, usually, with introduced species of bugs. I suspect they are egg-parasites of 

 these, but theoretically they should be bred from eggs of spiders. 



In Dyscritobaeus I have considered the segment, which is apparently the first and 

 fits close to the propodeum as the second, as I believe a preceding segment exists, but 

 is not readily observed. 



PsEUDOBAEUs, gen. nov. 

 Head as wide or wider than the thorax, eyes pubescent, lateral ocelli close to the 

 eye-margins. Antennae of the Z filiform, moniliform, 12-jointed; of % 7-jointed, with 

 large solid club, several lines of hairs no doubt indicating the effaced articulations. 

 Mesonotum with the parapsidal furrows indicated only posteriorly. Wings pubescent, 

 shortly fringed, basal nervure present, but faint, marginal vein shorter than the stigmal, 

 the latter oblique, but not extremely so, knobbed at the tip, rather shorter than the 

 postmarginal, which bears three or four bristly long hairs, similar to those regularly 

 disposed on the marginal and submarginal veins. Abdomen petiolate, the basal segment 



