South American species of Diahrotica. 85 



Separated from D. viridans by the different coloration 

 of the antennae, and by the much less distinct plication 

 of the sides of the elytra. 



Spec. 158. Diahrotica lahiata, Baly. 



Journ. Ent. Soc, xix., p. 233, 1886. 



Hah. Colombia {Steinheil). My collection. 



This species might be mistaken for a unicolorous 

 variety of D. speciosa, but may be known by the sub- 

 humeral sulcation of the elytron. 



Spec. 159. Diahrotica chrysopleura, Harold. 

 Col., Hefte xiii., p. 92. 



Anguste ovata, postice ampliata, convexa, nigra, siibtus nitida, 

 abdomine viridi-aureo sericeo, pectoris lateribus pube adpressa 

 aurea dense vestitis ; pedibus pallide viridibus, plus minusve piceo- 

 tinctis ; supra subnitida, antennis pallide flavis, extrorsum pallide 

 piceis, articulo basali nigro tincto ; thorace excavato, utrinque sat 

 profunde foveolato ; elytris rugosis, irregulariter elevato-vittatis ; 

 sordide rufis, apice margineque externo nigris. 



Var. A. Elytris totis rufis. 



Var. B. Pectore abdomineque rufis, antennis pallide viridibus, 

 extrorsum piceis. 



Long. 3 1 — 4 lin. 



Hah. Colombia, La Luzula (Steinheil), var. A and B ; 

 Cauca, var. B. Not uncommon in collections. 



Head triangular, clypeal ridge prominent, well-defined ; antennae 

 fiHform, nearly equal to the body in length in the ^ , rather shorter 

 in the $ , the second and third joints short, the fourth longer than 

 the preceding two united ; the six or seven lower joints pale yellow 

 or yellowish green, the basal one usually stained with black or 

 piceous, the four or five upper joints piceous. Thorax scarcely 

 broader than Jong in the <^ , rather broader in the J ; sides parallel 

 and distinctly sinuate from the base to beyond the middle, thence 

 obliquely rounded towards the apex ; disk convex, its hinder 

 portion excavated and impressed on either side with a deep fovea. 

 Elytra convex, coarsely rugose, disk with a number of raised 

 irregular vittiE, which anastomose with each other more or lesa 

 distinctly on the outer disk. 



Harold describes the elytra in this species as obscure 

 purple ; in all the specimens that I have seen they are 

 rufous, more or less stained with piceous. 



