248 



oscutellurn bronzy; front and middle femora nearly black with very slight metallic 

 lustre ; trochanters and femero-tibial joints yellow ; tips of all tibiae yellow ; all tarsi 

 yellow; mesopleura brilliant metallic blue ; metapleura shining metallic green. 



Male. — Length, 0.8 mm , expanse of wings, 1.9 mm , greatest width of forewings, 0.35 mm ; 

 differs from female in its more somber color, the general effect being brown rather 

 than metallic although the mesonotum and head are somewhat lustrous; the anten- 

 nae are cylindrical, the segments well separated subcylindrical and furnished with 

 short, finely distributed hair. The general color of the legs is darker ; the bauds at 

 the joints being narrow and darker ; hind tarsi dusky, middle and front tarsi yellow 

 except last joint. 



Described from one male and one female reared from Siphonophora 

 avence by F. M. Webster, at Lafayette, Ind. 



This species comes rather close to Encyrtus clavellatus Dalman reared 

 in Europe from Cecidomyid galls on willow, but is specifically distinct. 



AN AUSTRALIAN HYMENOPTEROUS PARASITE OF THE FLUTED 



SCALE. 



By C. V. Riley. 



We have just received from Mr. F. S. Crawford, of Adelaide, the 

 first Hyinenopterons parasite of Icerya yet found in Australia. It is 



Fig. 5i.—Ophelosia crawfordi, enlarged (original). 



a very interesting form belonging to a new genus, and as it will doubt- 

 less become an important factor in the life-chances of Icerya, and it will 

 be convenient to refer to it definitely by name, we take this occasion to 

 characterize it. Its nearest relative is Dilophogaster californica How- 

 ard, which breeds rapidly in California and is a noted enemy of the 

 Black Scale (Lecanium olece). So valuable a species is this last that 

 Professor Comstock found that on some trees 75 per cent of the scales 

 were destroyed by it, while in no case was the scale found without its 

 attendant destroyer. Moreover, Mr. Coquillett writes us that in 1889, 



