192 



years, although the earliest specimen I have seen was taken by 

 Mr. Swezey as late as March, 1910. The species nndoubtedly 

 has a wide range of hosts, and probably parasitizes many of 

 our endemic species of mealy bngs. I have reared it from 

 Pseudococcus gallicola and montanus Ehrhorn, and have found 

 it associated with Trionymus insularis Ehrhorn. I have also 

 reared it experimentally from the introduced Pseudococcus 

 longispinus (Targioni Tozzetti) and P. lounsburyi Brain, and 

 in the Board of Agriculture and Forestry collection is a series 

 of specimens reared by Mr. L. V. Lewis from Ripersia pal- 

 marum Ehrhorn. Perkins in his supplement to the Hymcnop- 

 tera of the Fauna Hawaiiensis claims that one or two species 

 of Anagyrus were introduced by Koebele but gives no particu- 

 lars as to the time of introduction or the source of the material. 

 Nigricornis, therefore, possibly may have been introduced by 

 Koebele although we have no definite proof in the shape of 

 preserved material or written records. I have seen a similar, 

 closely allied species collected by Mr. Muir in Fiji, which is 

 the only clew^ to the origin of nigncornis that I can suggest 

 In 1913 Mr. Fullaway recorded another species of Anagy- 

 rus as Encyrtus species with banded antennae which I have 

 named Anagyrus siuezeyi. His host record, however, is incor- 

 rect, as this species is parasitic only in Trionymus insularis 

 Ehrhorn so far as known, and there is no possibility of its 

 being parasitic in Saissetia. This parasite is common through 

 the lowlands of Oahu, and I have seen specimens from Lihue, 

 Kauai, and Lupe Ditch, Maui. Most likely it is present also 

 on the other large Islands, as no effort has been made to dis- 

 cover its distribution outside of Oahu. I am inclined to be- 

 lieve that it has been present in the Islands for many years 

 and it may possibly be endemic since it is much more closely 

 allied to the unquestionably endemic species of Anagyrus than 

 is nigricornis, and resembles theui in many particulars. 



