42 On a new Freshwater G uhiid from the Niger. 



waved pale greyish line, and preceded near suture by a dark 

 spot containing one or more small pupillate wliite spots; 

 wings hyaline ; face strongly transversely impressed between 

 the insertions of" the antennae, medially angulate, the lateral 

 margins before the angulation moderately concave ; vertex 

 with a distinct longitudinal impression. 



Vars. — Becoming darker in hue, the pale green coloration 

 replaced by dark testaceous, and with a large piceous or 

 dusky spot in the white subbasal spot to corium and in tiie 

 ])Ostmedial transverse whitish fascia to same. 



Long., inch tegm., 5-5^ mm. 



JIah. Bengal ; Pusa, MuzafTarpur, Barisah 



Allied to //. malai/etisi's, Disf., from which it differs by the 

 longitudinally impressed vertex, the angulate face, concolo- 

 rous legs, partial or complete absence of the ocellate spots on 

 apical area of tegmina, &c. The life-history of this insect is 

 being studied by Mr. Maxwell-Letroy, and it will be figured 

 in m}' conclusion of the Appendix to the Rhynchotal portion 

 of the 'Fauna of Britisii India.' 



IX. — Description of a neio Frpshwater Gobii'd Fish from 

 the Niger. By G. A. BoULENGEK, F.R.S. 



Eleotris pleurops. 



Body rather strongly compressed, its depth 3 times in total 

 hngth ; length of head 3^ times in total length. Head as 

 broad as deep, flat above, upper surface and sides scaled ; 

 snout broad, truncate, as long as eye; eye perfectly lateral, 

 4 times in length of head and twice in interorbital widtli ; 

 lower jaw not projecting; maxillary not quite reaching to 

 below anterior border of eye ; no canine teeth ; no pieeoper- 

 cular spine. Dorsals VII, I 8, well separated from each 

 other, longest rays | length of head. Anal I 10, opposite to 

 second dorsal. Pectoral | length of head, ventral |. Caudal 

 rounded-subacuminate, as long as head. Caudal peduncle 

 1^ times as long as deep. Scales strongly ciliated, 32 in a 

 longitudinal series, 10 between origin of dorsal and anal. 

 Dark brown, lighter on the belly ; tins brown, dorsals with 

 round whitish spots. 



Total length 75 mm. 



A single specimen from the Lower Niger, presented to the 

 British Museum by Mr. J. Paul Arnold, of Hamburg. 



