557 



t)pe of fullawayi has the mandibles partly closed and it is 

 impossible to examine the left mandible. In both specimens 

 the first tergite conceals the posterior face of the propodeum, 

 but I do not think there are any differences to be found on 

 the sclerite. There is no difference in the basal joint of the 

 anterior tarsus in the two specimens."' 



As the material so far accumulated shows considerable 

 variation in the male, especially as to the color of the pu- 

 bescence and dentation of the apical segment, and to a less 

 degree in respect to the mandibles and the hair on the fifth 

 tergite. I have no hesitation in regarding the identir\- of the 

 local material with fiillazi'ayi as fully established. 



Description of a New Species cf Octctrastichus from 

 Formosa (Hymen.. Chalcid.). 



BY P. H. TIMBERLAKE. 



In Februar}-. 1916. Mr. F. ^luir brought with him from 

 Formosa to Honolulu some midribs of sugar cane leaves from 

 which at least two species of Ootefrastwhiis were reared. One 

 of these which was obtained in considerable numbers was 

 placed in breeding cages and also liberated directly in the 

 sugar cane fields of Oahu. but apparently did not reproduce 

 under either condition, and certainly not in the breeding cages. 

 Of the second species about twent\' females and a few males 

 were obtained and these were placed in breeding cages. Con- 

 trary to the results with the first species, this one. which is 

 described below as O. foniiosanus, immediately began to 

 reproduce on the eggs of Perkitisi^lla sacc/wricida. and the 

 first generation at Honolulu amoimted to about 7S males and 

 11 females: the second to about *^3 males and 109 females: 

 and the third generation to about 512 males and 536 females. 

 After this the generations were inextricably confused and the 

 species was bred in large numbers for distribution on the 

 sugar cane plantations of Kauai. Oahu, ]Maui and Hawaii. 

 The work was continued throughout 1916 and 1917 and at 



Proe. Haw. Eut. Soo.. IV. No. :^. S^i>tember. 1921. 



