284 THE CANADIAN ENTOMOLOGIST 



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Tarsal claws 32 mmm. long; tibial spines vary from 20 mmm. 



, to 30 mmm. in length.; trochanteral spine varies from 118 mmm. 

 to 147 mmm. long, being of constant length in each specimen; 



• spiracles large and Sclerotinia-shaped ; anal lobes slightly de- 

 veloped, well rounded on the distal ends, and each bearing a seta 

 or hair varying from 265 mmm. to 295 mmm. in length; also bear- 

 ing several other hairs of varying lengths, from very minute (about 

 5 mmm.) to longer ones (45 mmm. to 90 mmm.); also bearing 

 cerarii composed of two stout, conical spines, surrounded by several 

 small, obscurely-triangular wax pores; also bearing four large 

 gland-pores, two on each lobe, and about 20 mmm. in diameter. 



Fig. 27. — .Antennal curves of Phenacoccus f>eltiti n. sp. 



from which lead cylindrical tubes; cerarii distinct and somewhat 

 elevated upon rounded protuberances; cerarii of the ultimate and 

 penultimate segments and the second head group as in figures. 



Type locality. — Vicinity of Columbia, Boone County, Mo. 



Remarks. — The writer nam.es this species in honour of Pro- 

 fessor Pettit, Entomologist of the Michigan Agricultural Experi- 

 ment Station. It has been found in the act of feeding on Ambrosia 

 trifida, Psedera quinquefolia, Rhus toxicodendron, Cercis canadensis, 

 Symphoricarpos orhicidatus, and Fraxinus americana. It was col- 

 lected from Celtis occidentalis, Carya ovata, Ostrya virginiana, and 

 Acer sacchanim upon which it was merely crawling. It is dis- 

 tributed in Missouri in Gentry, Jackson and Boone counties, and 

 it has been reported to the writer from Kansas. The character- 

 istic dorsum of this species will distinguish it in the field while 

 mounted specimens show many distinguishing characters, most 

 important of which are the projecting glands in the anal lobes. 



