258 ME. J. S. BALT ON THE GENUS DIABEOTICA. 



humeral callus with two longitudinal costee, which terminate at 

 a short distance below the middle of the elytron ; surface strongly 

 but not closely punctured, irregularly wrinkled. 



Similar in form to D. hivittaticollis ; smaller, the thorax less 

 deeply excavated ; the elytra much less closely punctured. 



APPENDIX. 



Spec. 7 a. DiABROTicA Klugii. Oblonga, postice ampliata, convexa, 

 flava, nitida ; capite, scutello, pectore, tibiis tarsisque nigris ; thorace 

 antennisque piceis, harum articiilis penultimis duobus sordidi-albidis, 

 thorace Isevi, utrinque obsolete foTeolato ; elytris minute punctatis, 

 maculis undecira, tribus basalibus, quatuor ante, et quatuor pone 

 medium, transversim dispositis, nigro-cseruleis ornatis. Long. 2\ lin. 



Hob. Colombia, Magdalena Eiver. 



Antennse piceous, in some specimens pale fuscous, second and 

 third joints short, equal, the third equal in length to the pre- 

 ceding two. Thorax smooth, impunctate ; disk impressed on 

 either side with a small fovea. Markings on elytra disposed as 

 in D. spilota , the outer one of the third row is sometimes obso- 

 lete. The black tibiae and tarsi, together with the fovese on the 

 thorax, will separate this species from D. spilota: 



DiABBOTiCA Fusco-MACULATA, Jacoly, ProG. Zool. Soc. 1878, 

 p. 994 = D. ornatula, mihi, antea, p. 224. 



Subsequently to the first part of this p aper being in print, I 

 discovered that the above insect had been previously described 

 by Mr. Jacoby ; my name must therefore fall. Mr. Jacoby gives 

 Ecuador and Bogota as localities of the species. 



Species unknown to me : — 

 DiABEOTiOA iNSTABiLis, ■?;. Harold, MittJieU. d. Munchener Mit. 

 Ver. 1877, p. 111. 



" Vertice medio foveolato, thorace evidenter bifoveolato, elytris subniti- 

 dis, sat dense punctatis; corpore subtus cum pedibus, metasterno 

 nigro excepto, testaceo, supra vel omnino testaceo vel vario modo 

 nigro-signato. Long. 5 mill. 



" Colombia. 



" Var. a. Supra omnino testacea, antennarum articulis 6-8 subinfuscatis. 



" Var. b. Elytris vitta humerali alterisque utrinque duabusante medium 

 at post medium, transversim positis, nigris. 



*' Var. c. Elytris vitta humerali, puncto ante medium alteroque ante 

 apicem, prseterea macula oblonga ad marginem ante apicem, nigris. 



