SPECIES OE THE GENUS DIABEOTICA. 219 



P. Elytra flavous, with a black or dark metallic blue annulus on 

 tbe anterior disk and a second below the middle, the latter 

 usually incomplete. 



13. DiABROTicA iN^auALis. EloDgato-ovata, postice ampliata, con- 

 vexa, pallide fulva, nitida ; postpectore, tibiis tarsisque nigris; capite 

 nigro-Eeneo ; antennis nigris, aiticulis ultimis tribus (ultimi apice 

 excepto) albidis ; thorace fulvo, late excavato, trifoveolato ; elytris 

 oblongis, postice paullo ampliatis, leviter riigulosis, tenuiter punctatis, 

 subtiliter elevato-vittatis, spatiis inter vittas obsolete sulcatis, costis 

 duabus infra humerum magis fortiter elevatis, interspatio inter illas 

 costas magis profunde sulcato ; nitido-flavis, utrisque vitta brevi 

 basali, communi, altera curvata, super eallum humeralem posita, 

 fasciaque brevi arcuata, medio interrupta, inter medium et apicem 

 sita, viridi-seneis. Long. 3J lin. 



Hah. Magdalena liiver. 



Head not longer than broad, trigonate ; mouth and antennae 

 black, the latter filiform, the third joint one half longer than 

 the second, the fourth equal in length to the previous two united ; 

 four lower joints piceous, stained above with black, the three 

 outer joints, the apex of the upper one excepted, pale yellowish 

 white. Thorax scarcely one half broader than long ; sides parallel 

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

 converging to the apex ; disk shining ; hind disk broadly excavated, 

 more deeply foveolate on either side and at the base. Elytra 

 oblong, dilated posteriorly, convex, faintly wrinkled ; each ely- 

 tron with six or seven slightly raised vittae, which are rendered less 

 distinct owing to the irregular wrinkles of the whole surface ; the 

 spaces between the costae subsulcate; two costse below the humeral 

 callus are more strongly raised than the rest, the space between 

 them being more deeply sulcate : a short vitta at the base of the 

 suture, another, curved, on the humeral callus, together with a 

 short, narrow, curved fascia, interrupted in the medial line, placed 

 between the middle and apex, bright metallic green. 



The vtrinkled elytra, together with the black tibiae and tarsi, 

 will at once distinguish the present species from most of its allies. 

 It is probable that in some specimens the basal metallic markings 

 are prolonged and confluent, forming a regular annulus, as in D. 

 hiannularis. It is closely allied to D. Haroldi. 



14. DiABROTicA Haroldi. Oblongo-elongata, postice paullo am- 

 pliata, fulva, nitida j postpectore, tibiis, tarsis oapiteque nigris ; antennis 



