26o Journal of Agricultural Research voi. iv, N0.3 



D. spengleri comma occurs in the Dominican Republic, Porto Rico, and 

 Dominica. In Porto Rico it intergrades by almost imperceptible changes 

 into the forms here named D. spengleri spengleri and D. spengleri 

 abbreviaius. On this island it has been taken at all times of the year at 

 Buena Vista, Guanica, Yabucoa, Luquillo, and Santa Rita, by Messrs. 

 D. L. Van Dine, T. H. Jones, E. G. Smyth, J. R. Johnston, and C. T. 

 Murphy, on sugar cane, grass, jobo {Spondias Ititea), bledo (Amaranthus 

 sp.), and Parthenium spp., and has been found in all stages at the roots 

 of sugar cane. 

 Diaprepes spengleri spengleri Linnaeus. 



J. The third variety also lacks a different-colored lateral vitta, but 

 has a short median denuded area on the third interval. This line varies 

 from a dot to several millimeters in length, but is usually distant from the 

 base. I take this variety to be typical D. spengleri spengleri. Size, 

 8 to 16 mm. (See PI. XXXV, fig. 3.) 



ja. The first form, with white scales only, is represented by a specimen 

 from Yabucoa, taken on sugar cane on April 20, 191 1, by Mr. D. L. 

 Van Dine. 



5&. Three specimens from the same place have the scales light yellow- 

 green. Five in various tones of green come from Yauco and Salinas, 

 Porto Rico, collected during May. 



jc. A specimen taken on sugar cane at Fajardo on January 25, 191 1, 

 by Mr. D. L. Van Dine is light yellow-green with an admixture of tawny- 

 ochraceous scales. 



jd. By far the majority of this variety are of light buff to ochraceous- 

 tawny in many different tones. These specimens come from Santa 

 Isabel, Guanica, Cidea, Bayamon, Ponce, Rio Piedras, San Juan, and 

 Maunabo, Porto Rico. One specimen from Cidea was taken by Mr. 

 F. D. Gardner as it was injuring the orange. 



je. Two specimens from Rio Piedras of the ochraceous-tawny color 

 were apparently collected in copulation on January 11, 191 2. The 

 female has the last ventral segment almost in the form of an isosceles 

 triangle, with the apex narrowly rounded. The male anal segment is 

 transverse subtriangular, with the apex broadly rounded and the surface 

 very rugose. Two other pairs agree in these characters. 



jf. This form is merely an intermediate between D. spengleri spengleri 

 and the next variety. It ranges in color exactly as the preceding, but 

 has elytral intervals i to 5 or 6 more or less broadly denuded. The 

 material is from Aguadilla, Utuado, Bayamon, Fajardo, and Mayaguez 

 in the Busck collection, and from Humacao, Guanica, Yabucoa, Caso- 

 vanas, Rio Piedras, and Ponce in Mr. Van Dine's collection, most of 

 which was taken on sugar cane. One specimen, collected at Cidea 

 by F. D. Gardner, was injuring the orange. Size, 9 to 16 mm. 



D. spengleri spengleri Linnaeus occurs only in Porto Rico. This form 

 intergrades perfectly into both D. spengleri comma and D. spengleri abbre- 



