17G 



THE CANADIAN ENTOMOLOGIST. 



ASPIDIOTUS (TARGIONIA^ HELIANTHI, sp. nov. 



BY PERCY J. PARROTT, MANHATTAN, KANSAS. 



9 scale 1.6 to 1.8 mm. in diameter, .5 to .6 mm. in altitude, 

 circular, quite convex, roughish, a light brown with slight tinge of pink ; 

 ventral scale thick, white at centre with brown on margin, not easily 

 separated from scale, when detached from host plant leaves but a very 

 slight trace of white; exuviae sublateral, often nearly marginal, orange, 

 covered with whitish secretion. 



$ oval, deep yellow, with dark brown on margin of posterior 

 segment, and yellowish brown about mesal lobes and region of pro- 

 boscis. When boiled in caustic potash becomes transparent, with mesal 

 lobes a yellowish brown, and region of proboscis a reddish brown. 







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Fig. 30. 



There are three pairs of lobes ; mesal large, more narrow at base, 

 broadening posteriorly, almost contiguous at apical end and quite 

 widely separated at base, distal end either notched so as to 

 resemble a human molar or almost truncate and broadly rounded 



on outer margin ; second and third pairs of lobes small, bilobed, 

 and mere tooth-like projections. In some specimens there is a 

 small rudimentary fourth lobe. The margin laterad of third pair 

 of lobes very notched. The first interlobular opening broad, in 

 some specimens equalling in width the base of mesal lobes. 

 Plates simple and short, projecting very little above margin. There 

 are generally two to each incision ; those of first incision the 

 largest, the remaining apparently very rudimentary. 

 Spines small, one on lateral of each' lobe. Anal opening quite 

 distant from margin. Tubular glands very numerous, as will be 

 seen in drawing. 

 This species was found by the writer on March 24th, 1899, on roots 

 of a sunflower, Helianthus annuus, near Hackberry Glen, Wabawnsee 

 Co., Kansas. 



