38 OIDES PKCTORALTS. 



guished according to the author's description by the flavous 

 head which is black in 0. pectoixdis to which I refer the 

 nine specimens in the present collection , which have been 

 captured during the Sumatra-Expedition at Boea, Soepa- 

 jang, Sidjoendjoeng , Moeara Laboe, Bedar Alam and 

 Loeboe Gedang. The antennae have the last 6 joints 

 black , the basal ones testaceous beneath , fuscous above. 

 Thorax impunctate, elytra deeply but remotely punctured. 

 Legs and breast as well as the head are black , the other 

 parts testaceous. 



Aidacophora I'osea Fabr. 



» dimidiata? Guer. 



Two exactly similarly coloured species, varying from 

 each other in size only, contained in this collection and 

 brought home by the Sumatra-Expedition , must be refer- 

 red to either of the two above insects which are probably 

 identical. 



In both the entire underside, thighs, head and thorax 

 are red; antennae paler, the second joint of which is very 

 short. The elytra are black from the base to below the 

 middle , the remaining portion being bright rufous , the 

 entire upper surface very shining. Elytra very finely punct- 

 ured , with a deep depression below the scutellum and a 

 distinctly widened lateral margin. Tibiae and tarsi are 

 black. 



All the larger specimens (from Sidjoendjoeng and Moeara 

 Laboe) vary from 5 to 6 lines , the smaller ones (from 

 Boekit Kandang , Boea , Solok , Rengkiang Loeloes , Silago , 

 Moeara Laboe , Soeroelangoen and Palembang) from 3 to 

 4 lines. Of the larger ones only females are before me, 

 but of the smaller both sexes. 



The description given here agrees perfectly with either 

 of the above named and described species , but while Guerin 

 gives the length of his species at 8 mill. , Fabricius does 

 not indicate the size at all. 



Notes from the Leyden ]VIiiseum, Vol. VI. 



