218 ME. J. S. BALT ON THE COI/OMBIAJT 



This insect may be known from any of the similarly coloured 

 species by tlie short third joint of the antenna. 



D. Elytra flavous, narrowly margined with black. 



10. DiABROTiCA LiMBELLA. Ovata, postice ampliata, convexa, flavo- 

 fulva, nitida ; pectore, pedibus (femoribixs basi exceptis), scutello capi- 

 teque nigris ; antennis basi piceis, articulis tribus ultimis sordide 

 albidis ; thorace la3vi, dorse non foveolato ; elytris subcrebre punc- 

 tatisj anguste nigro limbatis. Long. 3| lin. 



Sah. Colombia : a single specimen in my collection. 



Head scarcely longer than broad, triangular ; antennae slender, 

 filiform, the second joint short, ovate, the third one half longer 

 than the second, the fourth as long as the preceding two united. 

 Thorax nearly one half broader than long; sides parallel and 

 sinuate from the base to beyond the middle ; upper surface trans- 

 versely convex, not foveolate. Elytra ovate, dilated posteriorly, 

 convex, distinctly punctured ; the entire limb of each elytron 

 narrowly edged with black. 



11. DiABROTiCA NiGBOLiMBATA. Elongata, postice vix ampliata, 

 convexa, nigra, nitida, antennis basi sordide flavis ; abdomine tho- 

 raceque flavis, boe Issvi ; elytris sat crebre punetatis, flavis, nigro 

 limbatis. Long. 2§ lin. 



Hah. Paiue; Muzo. 



Head scarcely longer than broad, triangular ; vertex shining 

 impunctate ; front impressed above the enearpse with a large 

 fovea ; encarpse ill-defiued ; carina linear ; antennse filiform, the 

 second and third joints short, the latter nearly one half longer 

 than the former, less than half the length of the fourth ; three 

 lower joints obscure fiavous, stained above with piceous. Thorax 

 nearly one fourth broader than long ; sides straight and parallel, 

 slightly converging at the apex ; disk shining, impunctate. Elytra 

 subelongate, broader than the thorax, very slightly dilated from 

 the base towards the apex, the latter broadly rounded ; above 

 convex, closely and distinctly punctured. 



E. Elytra with the basal margin and a narrow curved line 

 below the middle cyaueous. 



12. DiABROTiCA AROUATA, Baly, Aim. Nat. Hist. 3 ser, iv. 

 1859, p. 271. 



Hob. Bogota ; Magdalena River. 



