SYSTEIVIATIC NOTES AND DESCRIPTIONS OF SOME WEE- 

 VILS OF ECONOMIC OR BIOLOGICAL IMPORTANCE. 



By W. DwiGHT Pierce, 



0/ the Bweau of Entomology, United States Department of Agriculture. 



1. THE MORE IMPORTANT COTTON WEEVILS. 



The discovery of a new cotton-square weevil in Peru and of a 

 cotton flower weevil in the Pliilippines makes it necessary for us to 

 asain resort to the older name of Mexican cotton-boll weevil for 

 Anthonomus grandis Boheman. The weevil from Peru, Anthonomus 

 vestitus Boheman, may be known as the Peruvian cotton-square 

 weevil, and the new Pliilippine weevil may receive the name of Phil- 

 ippine cotton flower weevil. 



ANTHONOMUS GRANDIS Boheman. 



The Mexican cotton-boll weevil is well known on account of the 

 great amount of literature written upon it. It is a blackish piceous 

 weevil with gray pubescence and without distinct patterns, except a 

 denser band of scales on the median line of the thorax. The vestiture 

 of the under surface is much denser than that of the upper siu-face. 

 The femora have two teeth, a large one and a small one. The py- 

 gidium is rather freely exposed. The funicle is 7-jointed, the second 

 joint being longer than the third. The claws are armed with a long 

 slender tooth. The ventral segments are sHghtly unequal, the fifth 

 being generally longer than cither the tliird or fourth. It varies in 

 size from 2.5 mm to 6.7 mm., and the color of the vestiture varies 

 from gray to brownish, while the integument varies from hght piceous 

 to black. 



The pupaB of Anthonomus grandis are readily recognized by the 

 quadrate tubercles on the prothorax and the shape of the caudal 

 process. 



ANTHONOMUS VESTITUS Boheman. 



The Peruvian cotton-square weevil has just appeared in our 

 economic literature,* and again Mr. C. H. T. Townsend is the 



' Charles II. T. Townsend. The cotton-square weevil of Peru and its bearing on the boll-weevil problem 

 in North America. Journal of Kconomic Entomology, vol. 4, No. 2, pp. 241-24S, April 17, 1911. 



Proceedings U. S. National Museum, Vol. 42— No. 1889. 



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