junei5, I9IS Sugar-Cane Root-Boring Weevils 259 



Dine on May 28, 1913, and October 20, 1910. The size varies from 11 

 to 15 mm. (PI. XXXV, fig. 2). 



2c. Another direction for the variation lies in the color of the scales. 

 Three specimens from Guanica and Santa Isabel, Porto Rico, have the 

 empire-yellow scutellar area and lateral vitta very distinct, but the 

 remainder of the elytra is clad with tawny-ochraceous. These were all 

 collected in May. Size, 1 1 mm. 



2d. The yellow sutural spots and lateral vittae are here replaced by 

 shrimp pink in four specimens, which are almost white in general vesti- 

 ture, and in two specimens, which are colored tawny-ochraceous, all 

 from Guanica, Porto Rico. One of the latter has the deciduous pieces 

 of the mandibles still intact. Size, 11 to 16 mm. 



2e. This form completely lacks the colored lateral vitta. A specimen 

 from Humacao, Porto Rico, collected on November 12, 1910, by Mr. D. L. 

 Van Dine, and one from Bayamon, Porto Rico, collected by Mr. A. Busck 

 in January, 1899, have the greenish scales predominant, while specimens 

 from Guanica and Santa Isabel, Porto Rico, have the whitish scales pre- 

 dominant. Size, 9 to 18 mm. 



2f. The next change consists in the intensification of the green scales 

 to shining pale yellow-green in specimens from Humacao, Barceloneta, 

 and Canovanos. 



2g. Then follows an admixture of a few ochraceous- tawny scales, especi- 

 ally posteriorly, in a specimen collected on sugar cane at Yabucoa, Porto 

 Rico, by Mr. D. L- Van Dine on April 20, 191 1. 



2h. The next modification is the strong admixture of ochraceous-tawny 

 scales on all parts of the elytra except near the suture, while on the thorax 

 and beneath, all the scales remain green, as found in a specimen from 

 Bayamon, Porto Rico, collected by Mr. Van Dine on October 9, 1910, 

 Size, II to 14 mm. 



21. In the final gradations of this variety the general scale coloring 

 of the elytra is light buff to ochraceous-tawny, numerous different tones 

 being found in the present series. In several specimens the body color 

 is a dark Hessian brown. Two specimens from Yauco, Porto Rico, 

 collected in May, 191 2, and two collected on sugar cane by Mr. J. R. 

 Johnston on June 11, 191 1; four specimens from Santa Isabel, collected 

 on sugar cane by Mr. Van Dine on May 30, 191 1; a single specimen 

 from Utuado, Porto Rico, in January, 1899, Mr. Busck, collector; two 

 specimens from Barceloneta, P. R., on May 16, 191 1, collected by Mr. 

 J. R. Johnston. Size, 12 to 16 mm. 



A newly reared specimen from Rio Piedras, collected on February 8, 

 1 91 2, on sugar cane by Mr. J. R. Johnston, has the mandibles complete. 

 The deciduous pieces are long, shining, curved, overlapping at tips, 

 with edges sharp and the tips acute, with the upper surface strongly 

 convex, and the lower surface concave. These pieces are longer than the 

 first two funicular joints together. 



