334 Journal New York Entomological Society. [Vol. xxvil. 



Disonycha capitata Jacoby. 



D. capitata Jac. Biol. Cent. Am. Col., vol. VI, pt. i, p. 316. 



D. quinquevittata Jac. Biol. Cent. Am. Col., vol. VI, pt. 1, suppl. p. 276. 



? D. pura Lee. Proc. Acad. Nat. Sc, 158, p. 86. 



I have specimens from Phoenix, Ariz., which agree with the de- 

 scription of the above named species. The head is black at base and 

 is generally more densely punctate than in any other species ; labrum 

 black, the surface of prothorax has usually only two black spots ; each 

 elytron with the usual black lines but they are mostly narrower and 

 the submarginal one is sometimes obliterated or absent; the body 

 beneath flavous, femora a little darker, apex of tibiae and tarsi black; 

 punctuation of prothorax and elytra extremely fine or obliterated, but 

 this is variable, in some specimens the punctuation of prothorax is 

 distinct. 



If my specimens are correctly identified as D. capitata Jac. there 

 is another character not pointed out by Mr. Jacoby, and that is the 

 relatively narrower prothorax in this species than in any of the dif- 

 ferent forms united under the name quinquevittata. There is a possi- 

 bility that D. pura Lee. is the same, in which case this name has 

 precedence. 



Jacoby, very likely following Horn, places this species in the " Sup- 

 plement " as a synonym of quinquevittata, but it ought to be recog- 

 nized at least as a variety. 



Disonycha fumata Lee. 



D. fumata Lee. Proc. Acad. Nat. Sc. Phil., 1858, p. 86. 



? D. crenicollis Horn. Trans. Am. Soc, vol. XVI, p. 204. 



D. fumata Lee. is placed by Dr. Horn, 1. c, p. 315, as a synonym 

 of quinquevittata but I think wrongly. In none of the forms of the 

 latter the two median thoracic spots are placed as closely together 

 that they occasionally form a large central spot as described by Le- 

 conte nor is the underside " fusco-nigris " and anterior femora " fusco- 

 testaceis." D. crenicollis Horn is the only species known to me to 

 which this applies. 



D. crenicollis Say was described from Mexico and it is rather 

 doubtful that this species occurs in the United States, at least Dr. 

 Horn's identification of that species does not agree with Say's descrip- 

 tion, which is given below. 



