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XIX. Descriptions of tico new genera and species of 

 Coleoptera from MacUujascar belonging to the 

 families Tenebrioniclai and Cerambycida3. By 

 Chas. O. Wateriiouse. 



[Read October 1st, 1879.] 



The two insects described in this paper have recently been 

 added to the British Museum from Madagascar. The 

 first is a Heteromerous insect, Avhich is very remarkable, as 

 being closely allied to two strictly American genera. The 

 second is one of the Lougicornia, for which I have been 

 obliged to propose a new genus. 



TENEBRIONIDJE. 



Pycnociiilus, nov. gen. 



Form and appearance of Dclognatlta. Submentum 

 nearly as in Phrenapates, Avith its lateral lobes porrect 

 and partially covering the base of the mandibles. ]\Ien- 

 tum trapezoidal, concave ; the anterior angles obtusely 

 rounded and elevated, the anterior mai'gin obtusely emar- 

 ginate in the middle. Ligula at least as long as broad, 

 narroAver than the mentum, subparallel at the sides, regu- 

 larly rounded in front ; palpi short, the 2nd joint sub- 

 globose, the apical joint very slightly curved, cylindrical, 

 a little nan-owed at the apex, as long as the two preceding 

 together. Outer lobe of the maxilla? somewhat parallel 

 (only a little narrower at the base), less flat than in Delo- 

 gnatlia, curved inwards at the apex, Avhich is obtuse, 

 and set with eight or ten stiff, curved bristles ; the inner 

 lobe is not much shorter than the outer one, narrow, 

 ciliated ; the first three joints of the palpi are subequal, 

 about one-third longer than broad ; the apical joint is as 

 long as the two preceding taken together, cylindrical. 

 Labrum transverse, deflexed in front, the anterior border 

 arcuate. Mandibles with three teeth at the apex. Eyes 

 as in Phrenapates, but not laterally prominent. Basal 



TRANS. ENT. SOC. 1879. — PART IV. (DEC.) 



