364 Rev. F. W. Hope on new Insects from Western Africa. 



Species. Filaments slender, attached, tufted, about three-fourths 

 of an inch in height ; cells usually about seven times as long 

 as broad, slightly contracted at the joints ; endochrome 

 black, contained in a small tube which passes through the 

 cells in a waved manner. 



It is not at all easy to make out the structure of this pro- 

 duction, unless it be immersed in a solution of iodine, owing 

 to the extreme transparency of the filaments, the dark colour- 

 ing matter being situated only in the narrow thread which 

 passes up the filaments. To the unassisted sight the filaments 

 are of a blackish- gray colour. 



Acton Green, Middlesex : several specimens. 



LI. — On some new Insects from Western Africa. By the 

 Rev. F. W. Hope, F.R.S., F.L.S. 



[Continued from vol. x. p. 95.] 

 To the Editors of the Annals of Natural History. 

 Gentlemen, 

 From illness I have not until now been able to continue the 

 description of the new insects received from Western Africa. 

 Those described at present are remarkable for beauty and 

 richness of colouring, and exhibit all the splendour so peculiar 

 to tropical regions. From the Rev. Mr. Savage I have lately 

 received some additional observations respecting the Goliath 

 Beetles, which it is my intention to transmit to you on a future 

 occasion. In haste, 



I remain, yours very sincerely, 

 February 22, 1843. F. W. HOPE. 



Sp. 35. Hydaticus discoidalis, Hope. Long. lin. 5j ; lat. lin. 3. 

 Affinis Hydat. dorsigero, Dupont, at minor. Oblongo-ovalis, thorace 

 obscure testaceo, suturali parte elytrorum nigra lateribus testaceis, 

 punctis minutisque per discum aspersis, corpore infra ferrugineo, 

 pedibus concoloribus. 



Sp. 36. Hydrous ruf of emoratus. Long. lin. 11 ; lat. lin. 5. Niger, 

 palpis rufo-testaceis, thorace glabro, elytrisque quibusdam lineis 

 punctato-striatis, punctis parum distinctis. Corpus infra atrum, 

 femoribus rubris, tibiis nigricantibus nitidis. 



Hah. Circa Palmas. 



Sp. 37. Hydrous distinctus. Long. lin. 9 ; lat. lin. 4. Niger, forma 

 ovali elongata, palpis rufo-testaceis. Elytra glabra punctis haud sub 

 lente distinguendis. Corpus infra obscure atrum et subtomentosum, 

 femoribus tibiisque nigris et nitidis. 



Hah. in Sierra Leona. 



There are two other species undescribed in the same collection 



