— 17— 



Habitat: Cosmopolitan, capable of infesting practically 

 any deciduous tree or shrub. It is known to thrive and to 

 withstand the severity of the winters as far north as St. Paul, 

 Minn. (Lugger.) 



Though very closely related to forbcsi and less so to 

 ancyliis, this species was doubtless originally introduced from 

 Japan, as trees imported direct from that country have been 

 found by Prof. Webster""'' infested with this species. Mr. 

 Craw, the quarantine officer at San Francisco, Cal. has also 

 found pcniiciosus upon trees received at that port from Japanf 



ASPIDIOTUS OSTKEAEFOKMIS Curt. 



Aspidiotus ostreaeforiiiis Riu'ii'ohi (Curtis). (lardciicr's t'lirouiL'Ic, 

 1S4;{. p. S03. 



Aspidiotus circiilaris V\\.^:\\. An. \W\t. X. ^'. St. Ai;\ Soc. isr)(), p. K-Mi. 

 Diaspis ostreaefoniiis, Comstiii-k. Urp. U. S. Dcpt. A<;'. 1880, p. 311. 

 Aspidiotus oslreat'/orviis Q\\\\X<.. Doiifiiiis, Eiit. Mo. Ma};'. , V^ol. XXIII, 



p. -r.v^. 



Female scalg dark gra\'. about i mm. in diameter; 

 exuviae very large, yellowish, sub-marginal in position. 



Body of female yellow to dark brown, nearly round; anal 

 segment more acute than in most of the native American 

 species. 



Anal segment of female with median lobes well devel- 

 oped, broad; second lobes developed on inner halves, not 

 exceeding one half length of median lobes, diminishing in 

 length by a rough margin to outer angle: third lobe rudi- 

 mentary. T\Vo small plates between median lobes; two 

 small plates with side branches betw^een first and second 

 lobes; and one plate between second and third lobes. A pair 

 of spines from each first, second and third lobes, and one 

 spine on lateral margin one-third distance to penultimate 

 segment. Mere trace of chitinous process on inner margin of 



*Caii. Ent. Vol. XXX, p. 170. July, 1898; Bui. 103, O. Exp. Sta p. 1P6. March, 1898. 

 +Cockerell, Ent. News., Vol. IX. pp. 95-96. 



