182 EEV. A. E. EATON OX EECENT EPnE]\£ERID^ OE MATELIES. 



no cross veinlets before the bulla, and usually 2-5 straight ones in the pterostigmatic 

 space. Length of body or wing, d im. 4-4i"5, 2 im. 5'5 mm. 



Jlab. Rainbodde, Ceylon, at altitudes of 4000 ft. and upwards (Hag. Mus. & M^Lach. 

 Mus.). The 2 imago (No. 40, Hag. Mus.) formerly attributed to this species is a 

 Telogaiiocles trlstis. 



Cloeon, sp. (nameless). 



Suhimago {dried), 6 . — Mesothorax dark brown-ochre in the middle, lighter at the 

 sides ; body discoloured, reddish brown or reddish piceous. Wings transparent, uniformly 

 pale warm sepia-grey ; neuration translucent, brown ; some of the interneural adventitious 

 veinlets in the neighbourhood of the pobrachial and anal nervures spring from the 

 terminal margin in pairs ; 4 cross veinlets in the pterostigmatic space, and 7 in the nearer 

 portion of the marginal area {i. e. before the bulla). Fore leg with the femur luteous, the 

 tibia and tarsus lutesceut, and the extreme terminal edges of the tarsal joints darker : 

 hinder legs very pale lutescent ; the femur banded with greyish before the tip, and marked 

 with a grey spot or dot on the outer side jvist by its extremity. Length of body 5, 

 wing 6 mm. 



JSah. Kainbodde, Ceylon, at upwards of 4000 ft. (No. 33 in Hag. Mus.). 



Cloeon bimaculatum, sp. nov., Etn. MS., in the writing of PL XVII. 31 d (wing 2 im.). 



Imago [dried). — 6 . Thorax above piceous ; abdomen discoloured ; setae whitish or 

 brownish white, with black joinings and annulations. Pore femur reddish brown, the 

 tibia and tarsus lighter and rather yellower ; hinder femora brownish amber, the tibia 

 and tarsus nearly of the same colour. Wings transparent with light brownish longi- 

 tudinal neuration (excepting the costa, subcosta, and radius, which are dull light yellowish 

 in tint, and only faintly coloured) and white cross veinlets ; at the base of the costal area 

 is a reddish brown spot extending to the wing-roots ; in the pterostigmatic region a 

 light bistre-brown spot, containing a clear space and traversed by white cross veinlets, 

 occupies the marginal and submarginal areas to their extremities ; the space intervening 

 between these two spots along the front of the wing is faintly tinged with light yellowish 

 brown : in the marginal area are about 4 cross veinlets between the great cross vein and 

 the bulla, and 7 or 8 beyond this, all simple. 



2 . Very similar. The cross veinlets in the front portion of the wing thickened as in 

 C. dipterum, 2 . Length of body 5-5"5 ; wing" 5'5-6 ; setae, d 13 mm. 



Hah. Ceylon (Thwaites, in M^Lach. Mus.). 



EUROPEAN SPECIES. 

 Cloeon diptebum, Linn. Pis. XVII. 31 a (forceps and 2 fore-leg and hind feet), 

 XLVII. 22 (caudal seta?, nymph). 



Ephemera diptera, or [_Ephemerci] , [Reaum., M^m. pour serv. a I'hist. des Ins. vi. pi. xlv. 1 (1742); 

 ? Poutop. (1753 & 4), and Naturliist. Dan. p. 223, pi. xvii. (1765)] ; Linn., Fn. Suec. ed. ii. no. 1477 

 (1761) ; id., Syst. Nat. ed. xii. pars ii. 906 [excl. obs.] (1767) ; [De G., Mem. d. Ins. ii. pars ii. 656, 

 pi. xviii. 1-9 (1771)] ; Fab., Syst. Ent. 304 (1775) ; id., Sp. Ins. i. 385 (1782) ; Retz., Gen. & Sp. Ins. 

 no. 184 (1783) ; Fab., Mant. Ins. i. 244 (1787) ; Raz., Hist. Nat. du Jorat, p. 210 (1789) ; VilL, C. Lin. 

 Entom. iii. 20 (1789) ; [ZscL., Mus. Lesk. i. 150, no. 19 (1789)] ; Gme'L, Linn. Syst. Nat. ed. xiii. i. 



