276 JAMES A. G. RKHN. 



centrally, the lateral angles moderately acute; posterior margins, and also of 

 the pronotum, with a series of longitudinal scars or linear protuberances of an aver- 

 age length of one millimeter. Abdomen strongly depressed ; posterior margins of 

 the dorsal segments with scars similar to those on the meso- and metanotum, which 

 become somewhat obsolete toward the apex of the abdomen ; ventral segments 

 and subgenital plate supplied with short, erect hairs. Supra-anal plate transverse 

 subrectangulate; posterior margin very broadly arcuate, centrally emarginate to 

 a slight degree. Cerci short, stout, hardly extending heyoud the edge of the 

 subgenital plate. Subgenital plate very broad ; apex very broadly rounded. 

 Anterior femora with one apical and two basal spines oil the anterior inferior 

 border and one apical on the posterior.no genicular spine present; tibia?, very 

 short, not over half the length of the femora ; metatarsi about equal to the termi- 

 nal tarsal joint in length. Median femora with one apical and two small cen- 

 trally placed spines on the anterior inferior margin, and but one apical spine on 

 the posterior, genicular spine present and larger than any femoral and smaller 

 than the tibial spines; tibia? about two-thirds the length of the femora; metatarsi 

 but slightly shorter than the remaining tarsal joints. Posterior femora with 

 three or four spines placed in the distal half of the anterior margin, posterior 

 unarmed and without apical spine, genicular spine larger than any femoral and 

 smaller than any tibial spine ; metatarsi longer than the remaining tarsal joints, 

 lower surface with two parallel, sub-contiguous rows of minute denticles, pulvilli 

 mi the metatarsi very minute and apical. 



General color blackish brown and dull ochraceous scrambled and intermingled, 

 the lateral borders and the median region, flanking a dark median streak, of the 

 latter tint. Eyes dull gray. Ventral surface of the abdomen blackish brown. 

 Limbs reddish brown, darkest on the tibiae. 



Measurements: 



Total length, ....... 19.5 mm. 



Length of pronotum, 6.5 " 



Greatest width of pronotum, .... 9.5 " 



Greatest width of abdomen, .... 13.1 " 



As the species of the gracilis, aptera, cicatricosa group appear 

 to be closely related, a key for the separation of some might be of 

 interest. All have been examined except aspera Tepper and depoliia 

 Brancsik (Jahresh. Naturwiss. Ver. Trencsen, xix-xx, p. 57, 1898), 

 the latter not being included in the table, as the description is very 

 incomplete and i'ts position uncertain. 



A. Head completely hidden under the pronotum. 



B. Front glabrous. Metatarsi of posterior limbs about 



equal in length to the remaining joints of the tarsi. 



cicatricosa Kehn (Costa Rica). 



BB. Front punctate. Metatarsi of posterior limbs exceeding 



in length the remaining joints of the tarsi. 



gracilis Brunner (Australia). 



