Jfo. I. ] American Blujht. 55 



wing-sj 0-2 inch; 5*08 mill.: size of body, '05 x '025 inch \ 1'27 X '62 

 mill, : leng'th of antennse, 'O^S inch; '62 mill. Uniterm colour dusky 

 brown, approaching to black : pronotum rather paler, abdomen carinated 

 and ringed : antennse short ; third joint long" and strong'ly ringed, the three 

 following joints less markedly so: wings ample and rounded at their 

 apices; membrane smoky and slightly punctured : cubitus broad, ending 

 with a large traj)ezoidal brown stigma : veins black, cubital vein with a 

 single furcation : legs short. The small sexuated lice produced by this 

 female appear to be born within a pseudovum. They have no rostrum, 

 which is represented by aborted buccal processes, its five-jointed antennae 

 and the tarsi also are not well developed; the eyes are small and the 

 colour of the ? is yellow, tinged with red. Tlie length of the % is 

 0-63 mill., and of the ^ 0'50 mill. The fact that both male and female 

 in this stage are without the usual sucking organ shows that they exist 

 simply for the propagation of the species^ and when that is accomplished, 

 they perish." 



Root inhahitlng form. — Thomas describes the root-inhabiting form 

 called Pemphigus pyri by Fitch thus : — "The young larvae are scarcely 

 O'Oi inch long, of an oval form, and pale dull yellow colour : legs short, 

 robust and nearly equal in length : the antennse appear much like a fourth 

 pair of legs and are five-jointed. From the extremity of the abdomen 

 usually appears a white filament of flocculent, cotton-like matter '^^ * *." 



Winged individuals. ^These are nearly quarter of an inch long lo the 

 tips of the closed wings ; body, legs and antennae, coal black ; the head 

 and abdomen above covered with cottony down : fore wings transparent 

 and slightly smoky, as though sprinkled with fine dust ; veins black ; 

 the third vein is rather more slender than the first, nearly straight, not 

 forked, its basal third abortive ; stigma dark, smokj^ brown, oblong ; its 

 opposite sides nearly parallel, abruptly conveying to an acute point at 

 each end : hind wings clearer; the two discoidal veins, black. The 

 winged individuals found in Illinois show some slight variation:- — "gen- 

 eral colour, black ; antennae not quite half as long as the body, third joint 

 half as long as the entire antennae ; abdomen more or less sprinkled with 

 white downy matter : wings transparent, third discoidal vein forked 

 near the middle, its basal portion obsolete ; stigma nearly three times as 

 long as it is wide, pointed at each end, and pale brown : length to the 

 tips of the closed wings, about one-seventh of an inch. 



Local Reports. — Mr. Daly writes (August 1889) from Conoor : — ''\i 

 [S. lanigera) has destroyed nearly every orchard in Conoor.^' -sf * « I jj^ve 

 syringed the trees affected, with the kerosine and soap emulsion, 

 afterwards applying lime and ashes with a little salt. I hope I have 

 not killed the trees. I cannot see any blight now, but some of the leaves 

 look as if fire had been placed to them. A friend tells me that they have 



