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XVII. On JNIacropsobium Cotterilli and other new 

 species of Coleoptera. from Lake Nyassa. 

 By H. W. Bates, F.L.S., Pres. Ent. Soc. 



(Read June 5th, 1878.) 



Mr. H. B. Cotterill, avIio has recently returned from a 

 prolonged visit to Lake Nyassa, and wlio was the com- 

 panion of Captain Elton on his adventurous journey of 

 exploration overland from Lake Nyassa to Zanzibar, col- 

 lected a few insects during his leisure hours in these little 

 known regions. One of them, which he has kindly added 

 to my collection, is a remarkable new form of Longicorn 

 beetle, allied to Necydalis, but of gigantic size for this 

 group, and showing Prionid affinities in the separation of 

 the epistome. I venture to submit a descri^^tion of this 

 interesting insect, adding those of four other species 

 from the same region, taken by other travellers. 



Anthia vitticollis. 



A. omostigmcB (Chaud.) affinis. Minus convexa, nigra 

 vix nitida, thorace vitta antico-laterali elytrorumque mar- 

 gine flavo-tomentosis ; elytris punctulato-striatis, inter- 

 stitiis vix convexis sparsim setifero-punctulatis. 



$ . Thorace postice bilobato-producto, antice paulo ro- 

 tundato-dilatato ibique quam lobis vix latiori. 



$. Thoraee breviter cordato, angulis anticis distincte 

 productis. 



Long. 20 — 24 lin. 



A fine and distinct species, belonging to the group 

 with spotted thorax, and differing from A. thoracica in the 

 spot not being broad and rounded but narrow and vitti- 

 form, as in A. omostujma. The shape of the thorax is 

 also very different, tlie anterior dilated part in the $ 

 being but slightly rounded and not much broader than 

 the postei'ior lobes. These latter, in fully developed 

 examples, are oblique at the apex, the external angle 

 acute, and the central dividing line deeply clei't. The 

 $ is distinguished also by the sides of the thorax being 



TRANS. ENT. SOC. 1878. — PART III. (oCT.) P 



