171 



Stigma lanceolate; the radius arising near its basal third, first al)scissa 

 of radius less than half as long as the width of the stigma, one-fifth 

 the length of the second, second abscissa one-half longer than the first 

 transverse cubitus, a little less than half the length of the ^nird abscissa; 

 recurrent nervure joining the second cubital cell, which is fi.ve-sided. 



Second tergite finely longitudinally aciculate antero-laterally ; suture 

 between the connate second and third tergites evident, usually finely 

 crenulate, the highly polished median triangular area of second tergite 

 separated from the lateral areas by imperfectly defined, percurrent, 

 fe'ebly aciculate, diverging impressions ; third tergite smooih and highly 

 polished ; second and third tergites subequal in length, the third widest 

 and three times as broad as long ; ovipositor exserted, nearly one-half 

 the length of the abdomen. 



$ The sculpture of the abdomen in the males varies greatly; some 

 have the second and following tergites smooth, the suture of the second 

 and third tergites not evident, not at all crenulate, while in others the 

 entire second tergite is aciculate. Antennae 20-24- jointed, usually 22 

 or 23. 



Described from 51 $ and 86 S specimens bred from the 

 Lantana-seed Agromvzid (still undetermined) by O. H. Swo- 

 zey, P. H. Timberlake and J. C. Bridwell npon tl:e island of 

 Oahn. First bred by Mr. Swezey from material collected by 

 him May 12, 1913. 



Type $ , allotype S and paratypes in the collection of the 

 Hawaiian Entomological Society; paratypes in the collection 

 of the Hawaiian Sugar Planters' Association, in the U. S. Xa- 

 tional Museum, and the private collections of P. H. Timber- 

 lake and J. C. Bridwell. 



This runs in Gahan's carefully elaborated tables of the 

 Xorth American species of Opius (Proc. LL S. Xat. Mus. 49 : 

 08-72) to Opius osciuidis fAshmead) known only in the male 

 sex from material bred from an Oscinis breeding in the leaves 

 of Plantago major at Washington, D. C. Our species differs 

 but little in the characters given in Ashmead's descri])tion. 

 The suture at the base of the scutellum is certainK not innate 

 in our species, nor are the lower parts of the head (except the 

 mandibles and the clypeus) yellow. Doubtless our species is 

 distinct and more differences will 1)e found when the 9 of 

 oscinidis is studied. 



