98 MR. M. JACOBY ON THE [Feb. 1, 



The antennfe and the legs in this species are subject to variation 

 in colour ; sometimes the first two joints of the antennae are stained 

 •with piceous as well as the legs and tarsi, the latter in other speci- 

 mens being entirely testaceous with the exception of the posterior 

 femora. 



Alytus (gen. nov. Halticinorum) . 



Body ovate, pointed behind. Head not longer than broad ; fronta 

 tubercles strongly raised ; antennae as long as or longer than the body, 

 the second and third joints nearly equal. Thorax subquadrate, the 

 angles not produced, the surface with a distinct transverse groove 

 near the base, extending to the posterior angles. Scutellum trigonate. 

 Elytra ovate convex, pointed posteriorly, regularly punctate-striate. 

 Posterior femora strongly incrassate, their tibiae with a distinct spine ; 

 the first joint of the posterior tarsi as long as the two following 

 joints together ; claws appendiculate. Anterior coxal cavities open. 

 Pi osternum narrowly elongate, much longer than broad ; meso- 

 sternum distinct, subquadrate. 



In its general appearance the insect, for the reception of which I 

 am obliged to establish the present genus, resembles a species of 

 Longitarsus, from which the distinct transverse groove of the thorax 

 and the short metatarsus of the posterior legs separate it ; the 

 punctate-striate and the ovate and strongly pointed elytra are further 

 characteristic of Alytus. A single species is before me. 



Alytus ceylonensis, sp. nov. 



Fulvous or testaceous ; posterior femora piceous ; the disk of the 

 thorax impunctate, the groove punctured ; elytra strongly punctate- 

 striate. 



Length |-1 line. 



Head impunctate, the frontal tubercles strongly developed, elon- 

 gate ; the third joint of the antennae thinner than the second, but 

 scarcely longer, the following joints more slender and elongate. 

 Thorax transversely quadrate, slightly constricted at the base, the 

 sides nearly straight, the angles rather obtuse, the surface entirely 

 impunctate, the transverse groove closely punctured. Elytra ovate, 

 convex, widened at the middle, fulvous ; each elytron with about ten 

 rows of regular and distinct punctures, the first row very short. Legs 

 testaceous, the apices of the posterior femora piceous. 



The general colour of the upper surface is dark fulvous, very 

 shining, the thorax and the legs being of a paler tint. The elytra 

 are strongly narrowed at the base and at the apices, so that the 

 thorax is broader than the elytra at the base. 



Thryl^a (gen. nov. Halticinorum). 



Body rounded, subovate ; eyes rather large ; frontal tubercles in 

 shape of oblique narrow ridges. Antennae rather short, the ter- 

 minal joints thickened. Thorax transverse, the anterior angles 

 obliquely truncate, the surface without transverse groove, the basal 



