EUPLECTINI 87 



margin of the eyes. Basal half of head with a sinuate sulcus on each side; this 

 sulcus arising on the occipital margin, extends obliquely mesiad to a point be- 

 hind the vertexal fovea, then turns sharply across the head behind the eye, to 

 the ventral surface of the head, where it expands abruptly into a deep ovate 

 fossa, half as large as eye and enclosing some of the ventral facets. Ventral 

 surface of head tumid between fossae, with a median basal gular fovea. 



Labial palpi relatively long, two-segmented. Mentum longer than wide. 

 Cardo of maxilla prominently exposed. Maxillary palpi four-segmented, first 

 segment relatively large, that is, distinctly wider than base of second; second 

 segment about three times as long as first, slender basally and arcuate to in- 

 flated apex ; third short, ovate-triangular, wider than second ; fourth longer than 

 second and wider than third, fusiform, with a very small palpal cone at apex. 

 Mandibles long, arcuate and well developed, twice as long as the simple labrum. 

 Labrum hidden dorsally by antennal rostrum, but mandibles clearly visible. 



Antennae long, about one-third of body length, eleven-segmented. Segment 

 I cylindrical, twice as long as II; II ovate; III to IX submoniliform; III, 

 IV, VI equal in length and width ; V half wider and slightly longer than either 

 IV or VI ; VII and VIII slightly larger than V, transversely moniliform ; IX 

 spherical, not as wide as VIII ; X transverse, drum-shaped ; XI ovate-acuminate. 



Pronotum widest anterior of middle, apical margin nearly straight, the sides 

 curving evenly each side to an incised notch opposite to and in part containing 

 a large lateral fovea, the sides then abruptly expanding to an acute tooth, then 

 narrowing obliquely to basal margin. Base with four foveae; disc crossed by a 

 deep, entire median, longitudinal sulcus extending from base to apical seventh, 

 and a transverse submedian sulcus, equally deep, connecting the lateral foveae; 

 a median foveoid depression formed where these two sulci cross each other. 



Elytra shorter than abdomen. Each elytron with two basal foveae, a sutural 

 at base of an entire sutural stria, and a discal at base of a deep dorsal stria 

 which extends to basal third of disc. Humeral angle prominent, with a sub- 

 humeral fovea on the elytral flank, recessed beneath a carina which extends 

 longitudinally parallel to margin, and turns mesiad at base just behind humerus. 



Abdomen with five visible tergites, but only three are visible from a dorsal 

 view. Proportions as given above. Third tergite is notable, bearing a long, 

 basally broad, apically acute spine from the middle of the apical margin. From 

 a dorsal view the abdomen ends with this spine, giving a highly unique outline. 

 Fourth tergite very short, set obliquely under the end of the third, and invisible 

 from above. Fifth tergite wholly ventral in position, and invisible from above. 

 Stemites seven: first small, hidden largely by posterior coxae save for a de- 

 pressed triangle between them; second longest; third, fourth and fifth progres- 

 sively shorter; sixth semicircular, enclosed by the fifth, as long as third; seventh 

 sternite very small, transversely triangular, not carinated, and enclosed between 

 the sixth sternite and fifth tergite. All sternites convex and simple. 



Prostemum not medianly carinate; granulated; lateral prosternal foveae 

 present. Anterior coxae long, conical. Middle coxae contiguous. Metasternum 

 long, longer than second and third sternites combined, with a deep median 



