272 LITHONOMA. 



the apex ; the surface is covered throughout (like the thorax) with 

 deep and coarse thickly arranged punctures. 



Legs sufficiently robust. The anterior femora subcylindrical, and 

 attenuate near the apex ; the surface being, like the elytra, coarsely 

 punctate. The tibiee are short, incurved at the immediate base, and 

 slightly thickened towards the apex, which is armed at its extremity, 

 below the insertion of the tarsus, with two minute spurs. The 

 tarsus is short and robust ; the basal joint is triangular, of the same 

 breadth as the apex of the tibiae ; the second is minute and sub- 

 circular ; tbe third is transversely oval and deeply bilobed ; the 

 apical claw is bifid, and armed at its inner surface with a minute, 

 broad basal tooth. The posterior femora are short, and very broadly 

 dilated. The tibiee (Tab. IX. fig. 7 g) are short, incurved at their 

 immediate base, and almost straight ; when viewed from behind, the 

 posterior surface is longitudinally grooved; the marginatum of this 

 groove is in outline sinuate, or obsoletely toothed, and produced in 

 front of the insertion of the tarsus into a distinct spur ; the apex of 

 the tibia) is armed, below the insertion of the tarsus, with two robust 

 incurved spurs ; the tarsi are short and attenuate. 



The genus Liihonoma is interesting as containing the only two 

 species of the whole of this group which are to be found in Europe ; it 

 has a facies peculiarly its own : by its subparallel and depressed form 

 it is evidently a connecting link between the preceding genera and 

 the genus (Edionychis ; it is distinguished at once by its parallel form, 

 by the rounded sides of its transverse thorax, by the absence of striae 

 or stria-like punctures of its elytra, and by the excavated or (when 

 viewed from behind) calcarate marginatum of the posterior tibias. 



1. Lithonoma Africana. (Tab. IX. fig. 7.) 



L. ovata, subparallela, depressa, punctata, cyanea; capite brevi, 

 qranulato ; thorace lato, transverso, Icevigato, punctato, undiqtie 

 fiavo-marginato ; elytris latis, depresses, ad apicem rotundatis, 

 rtunctatis, obsolete bicarinatis, longitudinaliter etiam vitta fiava 

 (post medium in marginationem defiexa) notatis, marginatione 

 quoque fiava ; pedibus antennisque nigris. 



Long. corp. 2| lin., lat. If lin. 



Ovate, subparallel, depressed, thickly punctate, of a dark cyaneous 

 colour. Head transverse, depressed, and slightly produced ; the eyes 

 are small, lateral, situated at the base of the head ; the surface is 

 irregularly granulated, more coarsely near the base of the antenna?. 

 Thorax broad, transverse, broader than the head, in front distinctly 

 but not deeply emarginate ; the anterior angles are subdepressed ; the 

 sides slightly rounded and broadly marginate ; the surface is levigate, 



