1904.] NATURAL SCIENCES OF PHILADELPHIA. 541 



Genus PERIXERUS Gerstaecker. 

 1873. Perixerus Gerstaecker, Entom. Zeit. Stettin, XXXIV, p. 192. 



Type. — P. squami'penms Gerstaecker. 

 Perixerus variabilis n. pp. • 



Type: $ ; Guadalajara, Jalisco, Mexico. September 18, 1903. 

 (J. F. McClendon.) Coll. Acad. Nat. Sci. Phila. 



Allied to P. Icevis Rehn,'^ but differing in the narrower interspace 

 between the mesosternal lobes and the y6ty different blue-gray and 

 yellow coloration. 



Size medium; form moderately slender; surface sparsely clothed 

 with long hairs. Head with the occiput moderately inflated, obscurely 

 punctate; interspace between the eyes rather broad, slightly wider 

 than the frontal costa; fastigium depressed, broad, blunt, with a broad 

 and shallow excavation; frontal costa subequal, not reaching the 

 clypeus, rather shallowly sulcate at and below the ocellus ; eye subreni- 

 form, longer than the subocular portion of the gense; antennse slightly 

 shorter than the head and pronotum. Pronotiim with the transverse 

 sulci moderately distinct; prozona about half again as long as the 

 metazona; anterior and posterior margins subtruncate; lateral lobes 

 slightly longer than high, the lower margin sinuate anteriorly; surface 

 rugoso-punctate, the metazona with the punctures finer. Prosternal 

 spine short, thick and blunt. Interval between the mesosternal lobes 

 cjuadrate ; interval between the metasternal lobes distinctly longitudi- 

 nal. Tegmina elongate-ovate, reaching to the apical margin of the 

 first abdominal segment, internal margins distant; apex bluntly 

 rounded; surface coriaceous-reticulate. Anterior and median limbs 

 moderately slender; posterior limbs rather slender, the imbrications 

 of the femora pronounced ; tibiffi with seven or eight (on one side) spines 

 on the external margin. 



General colors oil-green and lemon-yellow varied with verditer-blue. 

 Head bluish above, with a dull median triangular yellowish spot, and 

 a yellowish post-ocular streak which is bordered above and below with 

 blackish; lower part of face dull bluish and green, the gense greenish, 

 with the margins clear yellow and an obscure inferior bluish patch; 

 eyes chestnut; antennae bluish-black narrowly annulate with dull 

 bluish-green. Pronotum above blue with a distinct median line of 

 yellow, the posterior and inferior margins also narrowly edged with 

 dull yellow ; lateral lobes of the pronotum yellowish-green ; the trans- 

 verse sulci black except at the yellow median line. Tegmina glaucous 



15 Trans. Amer. Ent. Soc, XXVII, p. 98. 



