4 PROCEEDIIsrGS OF THE NATIONAL. MUSEUM. vol. 64. 



tarsal joints slightly darker at apex; wings hyaline, immaculate, 

 venation brown, stigma basally and costa pale, tegulae testaceous. 



Male. — Differs practically only sexually. 



Host. — Spider eggs. 



Type locality. — Oahu, Hawaii. 



Type.— C2it. No. 25915, U.S.N.M. 



Thirteen females and four males from various localities on Oahu 

 and Kauai Islands reared by O. H. Swezey February to May and in 

 November from the unindentified nests of a spider. 



In size the species varies from that of the type down to 2.75 mm. ; 

 the smaller specimens also differing in having the red color of abdo- 

 men and legs paler. 



Three female and one male paratypes are returned to O. H. 

 Swezey, of the Hawaiian Sugar Planters' Association Experiment 

 Station. 



ANUROTROPUS, new genus. 



The genotype runs in Foerster's key to his family Hemiteloidae 

 to Gnypeto7norpha., a genus without included species, and agrees with 

 all of the few characters there assigned to the genus. But it pos- 

 sesses several very anomalous characters that Foerster would surely 

 have employed had the species on which he based his genus possessed 

 them. For this reason and because I believe that if Foerster's type- 

 less genera are to be recognized the genotype should be selected from 

 the European fauna, I prefer to give it a new name rather than 

 assign it to Gynpetomorpha. 



Antennae short, 15 to 16 jointed, scape not oblique at apex, pedi- 

 cel cylindrical and nearly half as long as basal joint of flagellum, 

 latter much thicker at apex than at base, especially in female ; eyes 

 small, broadly oval; malar space very long; ocelli very minute; 

 temples broad and strongly convex. Thorax short, little longer than 

 high ; mesoscutum broader than long, notauli shallow but distinct and 

 nearly complete ; prepectus reaching only a short distance above front 

 coxae, its bounding carina curving sharply forward and nearly reach- 

 ing anterior margin of pleurum ; sternauli deep and complete, arching 

 apparently high up on the mesopleurum, the mesosternum swollen; 

 propodeum very short, vertical from apex of areola, completely areo- 

 lated except that costulae and apical abscissae of median carinae are 

 obsolete or wanting, areola broadly transversely quadrangular, much 

 wider at apex than at base, petiolar area comprising two-thirds the 

 total length, spiracles small circular ; legs long, femora stout, calcaria 

 very short, hind tarsi tapering from base to apex; front wing in- 

 completely veined, the second intercubitus and the postnervulus en- 

 tirely lacking and the second recurrent indicated only by a very short 

 stub on subdiscoideus and a hyaline line, radial cell very short, 



