268 [M^y. 



Elytra at the base distinctly broader than the thorax, the apical third arcuately- 

 attenuated, strongly striated, the strise closely and rather strongly punctured, the 

 interstices gently convex, moderately, distinctly, and closely punctured. Antennae 

 slender, about three-quarters the length of the elytra. 



Sah. : Honolulu, Hawaiian Islands. 



A single example received from the late Mr. W. Harper Pease. 



British Museum : March, 1879. 



DESCRIPTIONS OF TWO SPECIES OF CjENIS {EPHEMEEIB^) FROM 



LAKE NYASSA. 



BY TUE REV. A. E. EATON, M.A. 



A packet containing specimens of C(2'??iV, and endorsed "Edible 

 midges, whicli the natives of Nyassa make into cakes," was forwarded 

 to me by Mr. H. B. Cotterill last December. They were caught by 

 him on board a boat, about the middle of the lake, between Living- 

 stonia and Makanjeras, while passing through a cloud of them, on the 

 25th of January, 1877. The gloominess of the suburban atmosphere 

 in winter has caused their determination to be delayed. They re- 

 present the following two species, of which the second appears to be 

 the most plentiful. 



CiENis Ktjngf, sp. n. 



Imago sicca. — Corpiis isabclinmn v.furf^irosum, snhtiis palJide ochraceum, 

 femorihus lutescentibus, tihiis tarsisque alhidis, nisi tibia anticd maris forsan 

 pallide nigricanti excepta. Ala vitrina;, palJidissime castas versus plus aut 

 minus infuscata, costa cum nervis jyccucis proxime sequentibus nervulisque 

 transversalibus interjacentibus atro-p)iceis. 



Long. Corp. $ circiter S'S, ? 4-5— 5"0; al. S 3"0, ? 3'5— 375 ; set. <? 

 subim. 1"75 mm. 



C^NIS CIBABIA, sp. n. 



Imago sicca. — Caput supra 7iigricans, antennis albis. Thorax pallide 

 fuscescens, suturis apiceque mesothoracis nigris. Pedes albidce,femoribus 

 supra macula unicd trigonali prceapicali nigrd magna, coxisque extra nigris. 

 Alee vitrince crassioribus nervorum cum nervulis transversalihus interjacentibus 

 plus aut minus opace nigricantibus . Abdomen supra nigricans, ad juncturas 

 late lateraque versus albidum, atque segmentis 2 — 6 vel (?) minus opacis, vel 

 ((?) albidis : subtus ubique pallidum. 



Long. Corp. $ 2-o— 275, ? 4-0; al. $ 2—2-25, ? 3.0 mm. 



I may add, that some outlines of part of the external anatomy of 

 these species will be found in the Appendix to the Journals of the 

 late Captain Elton, recently published by J. Murray. 



Bromley, Kent : 19^7/. Marcl, 1879. 



