22 roicus. 



subparallel, depressed, with striae-like punctures disposed evenly 

 throughout the surface (these punctures are extremely minute, and 

 can only be seen under a very high power) ; an antemedial trans- 

 verse shallow depression (when viewed laterally) gives an appear- 

 ance of prominence to the surface near the scutellum ; at the 

 shoulders near the seventh stria is a short and well-defined longi- 

 tudinal depression. Antennae filiform ; the first j oint long and broadly 

 developed, especially medially and anteriorly, and slightly curved 

 (not geniculated) outwardly ; the second shorter and narrower, ovate ; 

 the third longer than the first ; these three basal joints are fulvous ; 

 the rest (which are shorter) are fuscous. Legs flavous, the anterior 

 tibiae and tarsi being fuscous. 



A single example of this species, from " Brazil," is in the collec- 

 tion of Mr. Murray. 



Genus 2. ROICUS*. 



Labrttm transversum. 



Palpi maxillares elongati, siibcylindrici, ad apicem attenuati. 



Palpi labiales paralleli, subelongati, art. 2" elongato. 



Antenna robiiske,jiliformes, approximates. 

 Oculi subglobosi, ad latera capitis, distantes. 

 Caput subdepression, subelongatum, haud attenuatum. 

 Thorax capite latior, quadratus, antice subemarginatus, ad latera di- 

 stincte angidatus. 



Elytra sat robusta, subparallela, ad apicem attenuata, baud ante me- 

 dium transverse depressa. 



Pedes robusti, tibia; incurvatce — posticis, apicem juxta, dente brevi 

 armatis. 



Labrum transverse, truncated at the extremities. 



Mandibles concealed. 



Maxillary palpi (Tab. I. fig. 5m) elongate, parallel, not geniculated; 

 the first joint minute ; the second subparallel, slightly constricted at 

 the base ; the third longer than the second, cylindrical, not rounded 

 at the extremities ; the apical minute, one-third of the breadth of the 

 second, and its length being hardly greater than its breadth, in form 

 conical. 



Labialpalpi (Tab. I. fig. 5n) elongate, parallel, the basal joint shorter 

 than the second ; the second subparallel, slightly attenuated towards 

 the base, the length nearly double the breadth ; the apical joint 

 minute. 



* poiicos, valgus. 



