COLEOPTERA OF BAJA CALIFORNIA. 247 



Head and thorax piceous black. 



Thorax distinctly punctate; elytra not costulate. ienuipes. 



Thorax smoother bicallous at base. Iwvis. 



Head and thorax reddish yellow; elytra piceous and distinctly bicostulate. 



hicolor. 

 Pale yellowish testaceous, elytra bicostulate. debilis. 



Metacolaspis n. g. 



Head oval, not deeply inserted, eyes free, entire, not 

 very convex, oval, finely granulated; front feebly sculp- 

 tured, clypeus not distinctly separated, labrum short, 

 transverse. Last joint of maxillary palpi slender, atten- 

 uate at tip, longer than the preceding joint. Antennse 

 slender, three-fourths the length of body, first joint thick- 

 ened, second one shorter than the third, joints 3-11 grad- 

 ually slightly longer. Prothorax transverse, the front 

 angles not dentiform, hind angles very obtuse, lateral 

 margin entire. Scutellum oval obtuse at apex. Elytra 

 very irregularly substriately punctate. Presternum be- 

 tween the cox« twice as long as wide. Legs moderate 

 in length, femora slightly fusiform, the tibise slender, the 

 four posterior feebly emarginate at outer angle of the 

 tip. Tarsi moderate in length, claws deeply bifid, the in- 

 ner division long and slender. 



The insect for which the above generic name is pro- 

 posed has the general aspect of Colaspt's hrunnea except 

 the color. It is certainly allied to Metachroma by the 

 structure of the prothoracic episterna, the bifid claws and 

 the emarginate tibiae. 



From Metachroma it differs in having the second an- 

 trnnal joint much shorter than the third. The other two 

 genera are from Malacca and the Philippine Islands. Pyro- 

 pida has a broad prosternum and less deeply bifid claws, 

 Chrysopida has dentate femora. 



