2 62 Journal of Agricultural Research voi. iv, no. 3 



4c. The next variation has the denuded intervals more or less widely 

 separated. It is denuded as in the preceding, but also has the ninth 

 interval denuded almost to the apex. The vestiture is in various tones 

 of bluish green with an ocherous area on each side of the scutellum and 

 an ochraceous-tawny lateral vitta. Three specimens are from the island 

 of Montserrat, collected on March i and April 2 and 9 by Mr. H. G. Hub- 

 bard. One specimen is labeled " Diaprepes abbreviatus." There are 

 also four whitish specimens from Arecibo and Barceloneta, Porto Rico. 

 Size, 14 to 16 mm. 



4d. The next form is similarly denuded except that the denuded 

 space on the ninth interval is united to that on the eleventh at about 

 the middle of the elytra. The vestiture is intermixed white and golden 

 green. Two specimens from Barbados were collected by Mr. J. Morris, 

 on May 22, 1900, and fourteen were collected by Mr. H. A. Ballou. 

 These are all males of the form Diaprepes spengleri jesiivus. 



D. spengleri abbreviatus occurs in Porto Rico, Dominica, Montserrat, 

 and Barbados, and occurs on sugar cane in both Porto Rico and Barbados. 

 The Porto Rican material assigned to this form does not closely resemble 

 that from Barbados, but the variation in the Porto Rican material 

 from the D. spengleri type is so great that at the other extreme speci- 

 mens identical with those from Dominica and Montserrat can be found. 

 In the same way the Montserrat material varies to the typical Barbados 

 material, which incidentally is all male. In Guadeloupe it has been 

 found on avocado, coffee, and Cajanus indicus. 



Diaprepes spengleri festivus Fabricius. 



^a. The fifth variety differs from the preceding by having a double 

 row of punctures between the two humeral denuded intervals. It has an 

 ocherous lateral vitta and spots on each side of the scutellum. The 

 discal denudation of the seventh interval is highly variable, sometimes 

 being connected in front to the ninth interval at about the middle of 

 the elytra. The vestiture of some specimens is white and of the others 

 greenish. Twenty-one specimens, probably D. spengleri festivus Fab- 

 ricius, from Barbados, mostly females, were collected by Mr. H. A. 

 Ballou (PI. XXXVII, fig. i). 



56. The next form is like the preceding, but without any denudations 

 of the ninth interval and without ochraceous markings. One specimen 

 from St. Vincent was collected by Mr. H. H. Smith and labeled D. 

 spengleri by Mr. Champion. 



5c. The next variation is like the preceding, but has the denuded 

 portion of the third interval short, discal, and the vestiture uniformly 

 buff-yellow. Four specimens from St. Vincent were collected by Mr. 

 H. H. Smith, one of them on the castor plant {Ricinus communis). 

 They are labeled D. spengleri by Mr. Smith. 



D. spengleri festivus differs only by the humeral strial punctuation from 

 the preceding. This form is found in Barbados and St. Vincent. It 



