BISTOLACA. 1 ] 7 



gato, tribus proximis longitudine peiparum decrescentibus, 

 casteris brevibus, fere seqnalibus, subincrassatis. 



Lahrum (fig. 12 6) transvcrsum, apiee incrassato, declivi. 



Mandibidce (fig. 12 c) crassge, siibtrigona?. 



Palpi maxUlares (fig. 12 d) articiilo primo parvo, seciindo subclavato, 

 tertio obovato, ultimo elongate, ovato ; lahiales (fig. 12£?) articulo 

 primo parvo, sceundo obovato, ultimo elongato, ovato. 



Mentum (fig. 12/ ) oblongo-ovatum, apice angulatum ; ligida (fig. 12y ) 

 apice bilobata. 



Thorax subquadratus, sujjra convexus, exeavato-punctatus. 



Scutelhim oblongura, apice paullo ampliatum, obtusum. 



Elytra oblonga, apice rotundatu, dorso subconvexa, costata. 



Pedes breves, valid! ; tarsis latis, luigue crasso. 



Corpus elongatum, subconvexum. (Type, Distolaca White!.) 



This genus is nearly allied by the form of its labium to Gono- 

 phora, but it may be readily distinguished by the shorter, subin- 

 crassate antennae. 



In the present genus, as also in Gonophora, the apex of the 

 apical segment of the ligida, instead of being free, as in most other 

 genera of the family ^dth which I am acquainted, is articulated 

 to, and continuous mth, the base of the lingua : in Alurnus it is 

 even more closely united, all marks of articulation being absent. 



1. Distolaca Whitei, n. sp. Tab. VIII. Fig. 5. B.M. 



D. elongata, dorso subdepressa, nitida ; supra testacea ; antennis 

 ocuhsque nigris ; elytris chalybeis, basi testaceis ; utrisque tri- 

 carinatis, interspatiis ])ifariam punetatis ; subtus pallide fulva ; 

 tarsis abdomineque nigris. 



Long. 2^ Un. 



D. elongate, subdepressed along the back ; above shining testaceous ; 

 antennae black ; elytra deep metalhc blue, their extreme base tes- 

 taceous. Head smooth, eyes piceous ; anteimae with the basal 

 joint, and also the extreme apex of the second, stained with 

 rufous. Thorax ti'ansverse-quadi-ate ; sides margined, sinuate 

 behind, slightly produced and rounded in front, notched at their 

 extreme apex, outer edge of margin obsoletely erenate ; above 

 very convex, cylindrical at the apex, surface smooth and shining, 

 irregularly excavated and impressed with a few deep punctures ; 

 the anterior margin, a broad longitudinal space in the middle 

 longitudinally grooved along its centre, and an elevated ridge on 

 either side, fi-ee from punctures : bright shining testaceous, ex- 

 treme lateral margin piceous. Scutellum smooth, impunctatc. 

 Elytra broader than the base of the thorax ; sides margined, sub- 

 parallol, slightly dilated along their middle ; apex rounded ; above 



