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Otumba peruviana, sp. п. 



An insect of about the same size as 0. marcapata H a n - 

 с с к, or a trifle larger, and iu whicli the lower posterior angles 

 of the pro no tum are similar. Instead of the supplemental longitudi- 

 nal inter-humeral carinae the présent species possesses a single 

 short prominent oblique ridge on eaeh side, the apex of which nearly 

 reaches the median carina, and back of the depressed area is a 

 second, but more obscure diagonal ridge with the apex directed to- 

 wards the carina cephalad, thus forming a broken Х-Ике adornment. 



Head moderately large, much widest below; the toj) of the 

 head depressed and a little broader than one of the prominent but 

 not very large eyes; vertex truncate, not quite as far advanced as 

 the front edge of the eyes, gently arcuate inwardly, the median 

 carina or continuation of frontal costa quite prominent, the lateral 

 or oblique carinae continued backward and upward to the middle of 

 the eyes so as to form prominent horn-like projections when viewed 

 either from in front or from the side; frontal costa rather prominent 

 and with the sides broadly divergent between the antennae; posterior 

 ocelli on a level with or a little below the lower edge of the eyes; 

 the antennae situated considerably below the eyes, of moderate length. 

 Pronotum slightly depressed or flattened above, the apex slender 

 and passing the femora by half their length, granulate, punctate, 

 the medio-humeral région with the terminal portions of decussate 

 lines as described above, otherwise witliout supplemental discal ca- 

 rinae; median carina biundulate auteriorly, the undulation just back 

 of the first transverse sulcus the most prominent, slender and in- 

 conspicuous posteriorly; lower posterior edges turned outward, nearly 

 rectangulate. Posterior femora rugose, the hind tibiae paucily and 

 weakly spined. 



General color fuscous or dull black, varied with brunneo-testa- 

 ceous. Hind femora witli the exception of the knees of the pale 

 color. Tibiae and tarsi very strongly fasciate with fuscous. 



Length of body, d", 8 mm., to tip of pronotum and wings, 11 

 mm., of pronotum, 9.85 mm., of hind femora, 5.35 mm. • 



Hab. A single maie spécimen taken by N. Ikonnikov 

 about fifty miles south and east of Cerro Ле Pasco, Peru, at an élé- 

 vation of 1800 meters. 



The coloration of the single spécimen hère described is evi- 



.30 



