230 ME. J. S. BALT ON THE COLOMBIAN 



The Colombian Species of the Genus Biabrotica, witb. Descrip- 

 tions of those hitherto uncharacterized. — Part II. 

 By Joseph S. Balt, T.L.S. 



[Read 17th December, 1885.] 



Section II. 



Second joint of antenna short, the third much longer, 

 nearly or quite equal in length to the fourth. 



Subsection 1. — Disk of thorax immaculate. 



A. Body elongate or oblong, dilated posteriorly. Elytra elevate- 

 vittate, seriate- or subseriate-punctate, the punctures being 

 more or less regularly arranged between the vittse in double 

 rows ; disk black or piceous, rarely {coruscd) metallic blue 

 or green ; the entire outer limb, together with a subsutural 

 vitta, confluent at its apex with the limb itself, flavous or 

 yellowish white. 



38. Diabeotica coeusca, v. Harold, Col. Hefte, xiii. 1875, p. 92. 

 Hah. Magdalena River, Fusagasuga ; Bogota ; also Mexico, 



Oaxaca {Salle). 



Very close to i>. innuba, Fabr. ; larger and less dilated pos- 

 teriorly; its elytra variable in colour, always with a distinct 

 metallic tint. 



I possess a long series of this species, the majority of them 

 simply labelled Colombia without more precise locality, 



39. Diabeotica innuba, Fahr. Syst. Ent. 1775, p. 117. 



Hal). Colombia, Magdalena Eiver ; also North America, 

 Mexico, West-Indian Islands, and Cayenne. 



Shorter and broader than D. corusca, v. Harold ; more dilated 

 posteriorly ; in both insects the second and third costse from the 

 suture are equal in width, being each broader than any of the 

 outer ones ; the antennse in both are pale and slightly stained 

 with fuscous towards tlie apex, the eighth and ninth joints not 

 being paler than the rest. This species appears to have a more 

 extended range than the previous insect. 



