PRIONID^. 45 



10. Mallodox Gnatho, n. s. B.M. 

 M. mandibulis basi elevatis, apice quadridentatis, dentibus tribus 



margine interiore, imo exteriore : spatio inter oculum et basin 



mandibuli processus tridentato. 



Jaws at the base with an elevated triangular process, abrupt 

 behind, and gradually sloping in front, the extreme tip with three 

 teeth, over which is another tooth. At the base of each man- 

 dible there is a projection with three blunt teeth at the end, the 

 central smallest and indistinct. Head verrucose in front, with a 

 deep transverse groove, a longitudinal impressed line on the ver- 

 tex deepening into a groove between the eyes ; punctured very 

 closely behind. Thorax rather convex, undulated here and there 

 in the middle ; margins widely and thickly punctured ; sides 

 serrated with rather sharp teeth. Scutellum slightly punctured. 

 Elytra with three wide longitudinal ribs, obsolete at the base and 

 tip, the middle one with two branches near the end one on each 

 side, the one directed towards the margin nearer the tip than the 

 other. Metathorax covered with silken yellowish brown hairs; 

 lower edge of the tibise edged with yellowish brown hairs ; soles 

 of tarsi with yellowish brown hairs, the tips of which are greyish. 



Length 20 lines. 

 Hab. Honduras (Coll. Dyson). 



11. Mallodon LiEVIPENNE, n. s. B.M. 

 M. elytris laevibus, capite inter antennas subexcavato, thorace 



medio lsevissimo. 



Head somewhat depressed between the eyes and grooved lon- 

 gitudinally ; excavated between the antennee, the latter part 

 thickly punctured ; rest of the head irregularly and coarsely 

 punctured. Thorax very smooth and depressed on the back, with 

 some small scattered punctures, the sides irregularly punctured ; 

 the margins with from ten to twelve small tooth-like crenations. 

 Scutellum somewhat hollowed at the base, the tip slightly 

 notched Elytra very smooth. 



Length 19 lines. 

 Hab. Congo. Sir J. Kichardson, M.D. 



12. Mallodon costipenne, n. s. B.M. 



M. elytris singulis costis tribus suhelevatis, exteriore basi obso- 

 lete ; thorace medio lsevi lateribus punctatis, margine sub- 

 crenato-dentata. 



Head irregularly punctured, in front the punctures are small 

 and close together ; antennas with the joints punctured. Thorax 

 with a large smooth space in the middle, with only a few scat- 

 tered punctures ; a longitudinal ridge on each side of the smooth 

 space which does not reach the front margin, and behind runs into 



