EEV. A. E. EATON ON EECENT EPHEMERID/E OR MAYFLIES. 171 



pitch-black. Hindci' legs lighter in tint, but ornamented nearly in the same manner. 

 Ijengtb of body, d 10; wing, d 12, ? 14; settB, c? 26, subim. 20 mm. 



Sab. Irazu, Costa Eica, GOOO-7000 feet. (H. Rogers, Salvin and Godman Mus). 



(?) Baetis Stelzneri, "Weyenb. 



Cloe Stelzneri, Weyenbergh, Tijdscli. v. Ent. xxvi. 1882-3, p. 170 (1883). 



Imago {living). — d . Upper portion of oculi dark red, the lower blackish grey. Thorax 

 darker than in the ? , so are the legs ; pleurae greyish yellow. 



? . Thorax sepia-brown, traversed longitudinally throughout the notum by a darker 

 median line or stripe, and with much darker wing-roots. Abdomen pearl-grey beneath, 

 and somewhat darker on the back, the colour there approaching steel-blue. Seta; (? 2) 

 pearl-grey, the joinings as good as invisible. Wings unclouded, with almost black neu- 

 ration. Length of body 5-5, wing 6, setae 7'o mm. 



Hab. Cordova, Argentine E,epublic ; summer and autumn, scarce. (After Weyen- 

 bergh). — Prom what is remarked of the wings, I conjecture this to be a species of Baetis: 



INDIAN AND CINGALESE SPECIES. 



Baetis . 



X Clol'on dehilis, ! Walk., Trans. Ent. Soc. London, N. S. v. 199 (1860) . 



Baetis II debUis, ! Etn., Trans. Ent. Soc. London (1871) 112 [nee % B. delnlis, Walk. (1853)]. 



Imago {dried). — 2 . "Tulva, capite nigro, abdomine testaceo ; setis pedibusque albis, 

 alls vitreis, venis albis." — An insufficiently described species, with 5 or 6 simple, oblique 

 cross veinlets in tlie pterostigmatic portion of the marginal area of the fore wing. Length 

 of body 5 ; expanse of wings 12 mm. 



Ilab. Hindostan (Walk., in Brit. Mus.). 



BAiiTIS FEMINALIS, sp. UOV. 



Imago {dried). — 2 . Wings vitreous, with pale pitch-l:)rownish neuration ; 2-5, gene- 

 rally simple and straight, fairly strong cross veinlets in the pterostigmatic space of the 

 fore wing, without any interjacent granulations. Body bright reddish brown, the thorax 

 polished ; penultimate dorsal segment pale ochraceous, the other segments at the joinings 

 dark or piceous; setae pale warm sepia-brown, with grey joinings. Fore femur, for the 

 most part, reddish piceous-brown, its apical margin and extreme base pale dull yellowish 

 white ; the base of the tibia of the same pale colour, the rest of the tibia and the tarsus 

 light sepia-brown ; hinder legs pale sepia-grey, or whitish tinged with yellowish ; the 

 femora broadly banded with reddish j)iceous-brown near their extremities. 



S . Snbsimilar, but having the abdomen from segment 2 up to the basal half of seg- 

 ment 6 translucent, with piceous joinings ; the tibiae, tarsi, and bases of the hinder femora 

 more nearly whitish ; the setae rather paler ; and the neuration of the wings paler than 

 in the 2 . Length of body, 6 4-5 ; wing, d 5-5, 2 6 ; setae, 6 about 13-5, 2 8 mm. 

 Sab. Raiubodde, Ceylon, at altitudes of not less than 4000 feet (Hagen Mus.). All 



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