BATRISINI 245 



Head with occiput, vertex and front with the punctures elevated so that 

 the integument is minutely but distinctly granulate; clypeus subrugose. A 

 very long, median longitudinal carina extending from the occiput across the 

 vertex to a line drawn through the bases of the antennal tubercles ; this carina 

 abruptly limited apically by the interfoveal sulcus. Interfoveal sulcus is entire, 

 connecting the vertexal foveae, and does not extend down the front as in 

 sternadens; floor of the sulcus glabrous; external wall of sulcus more sharply 

 defined than internal wall in the region of the eyes, and less sharply defined than 

 internal wall anteriorly; sulcus transversely ovoid between antennal tubercles, 

 very sharply defined basally so that the long vertexal carina has its apical end 

 bifurcated. Supraocular lateral carina as in sternadens. Ocular-clypeal carina 

 not angulate as in sternadens but broadly arcuate. Eyes with about 64 facets, 

 the facets being fewer and larger than in sternadens. Fronto-clypeal area 

 declivous, the front between antennae in the form of a triangular field with 

 laterally carinated edges. Ventral surface of head sparsely granulated. Labrum 

 as in sternadens save that the produced apical comers are more obtuse. 



Maxillary palpi with first three segments typical of the genus, the distal 

 (fourth) segment with a small, oblique, foveoid scar at the middle of the ex- 

 ternal face. This distinctive feature is equally well-developed in the allotype 

 female, and in the paratypes of both sexes. 



Antennae eleven-segmented, distant, integument granular; segments all 

 simple, all longer than wide, without foveae, dilations or other abnormalities. 



Pronotum truncate-cordate, integument with sparse, elevated punctures 

 which are smaller than those of the head. Disc simple. Lateral margins not 

 spined. Two strong conical, sharp, antebasal spines at basal two-fifths, with 

 an elongate-oval, subsulcoid median fovea between these spines, and a deep, 

 circular lateral fovea between each spine and the lateral margin. Base of pro- 

 notum with a pair of small foveae each side, that is, a fovea basal to each spine 

 and a fovea basal to each lateral fovea. 



Ventral surface of prothorax highly abnormal. In the first place, the flank 

 of the pronotum is a glabrous, triangular plate with carinated edges which 

 extends ventrally on each side as a free process. This is best appreciated from 

 a lateral view. From a ventral view each of the pronotal wings is seen to give 

 rise to an oblong lamella on its mesial face, this lamella extending obliquely 

 mesio-posteriorly. Between these oblique lamellae the prosternum is erected 

 into two abnormal processes: (1) an acutely arcuate, subtruncate lamella at 

 center, and (2) a fusiform spinoid process between the anterior coxae, this 

 process strongly arcuate anteriorly, with its sides fringed with stiff setae. This 

 pronotal-prosternal modification equally well developed in the male paratype. 



Elytra with sparse elongated punctures and prominent oblique humeri; 

 each elytron with a sutural stria, the interstrial space elevated and the punc- 

 tures subtuberculate. No dorsal stria and no trace of basal foveae. 



Abdomen with five tergites with proportions as in sternadens; lateral mar- 

 gins weaker than in sternadens, and last tergite not transversely impressed at 

 but simple convex with a strongly concave apical margin. Five fully 



