196 EEV. A. E. EATON OX EECENT EPHEMEEID.E Olt MAYFLIES. 



Imago (dried). — Wings colourless in d , ornate in ? ; femora marked with a row of 

 6-8 or more round spots, and witli a few dots (most distinctly so in the hinder legs), some- 

 times confluent iu part ; tarsal joinings, ungues, and the last 1-3 joints blackish- or 

 reddish-brown. — Body greatly discoloured ; thorax above pitch-brown in d , dark lutescent 

 in $ ; abdomen closely punctulate above, and still more so beneath ; the venter and 

 some parts of the dorsum rosy whitish-brown, with the punctulatioas dark red-brown; 

 the remainder of the dorsum pitch-brown. Setm white or reddish white, sometimes 

 banded with grey; the joinings greyish in the d , black in 2 . Wings vitreous; ptero- 

 sligmatic space slightly fuscesceut in d ; in ? the marginal and submarginal areas, and 

 the base of the fore wing are marbled with light umber-brown somewhat faintly and more 

 evenly than iu the two preceding species, the disk and terminal margin are also irregularly 

 clouded with faint tints of a like colour ; neuration pitch-brown, the terminal margin in 

 2 , and nervures 1-4 in both sexes, white here and there ; cross veinlets dark in <S , white 

 in 2 ; the marginal area in d has no cross veinlets before the bulla, but has 6-8 beyond 

 it ; in $ there are 6-9 vex-y faint before, and 11-16 beyond it, which are mostly simple, 

 and have no granulation interposed between them. Length of body 5-6'5 ; wing 5"5-7; 

 setae, d im. about 14, 2 about 15 mm. 



Hab. Widely distributed in the southern parts of N. America ; California, at Brooklyn, 

 San Jose, San Raphael (31 March, Osteu-Sackeu), and San Gerouimo (20 April, idem); 

 Texas iu Bosque Co. (Belfrage) ; Guatemala (5000 feet) ; and Aceytuno (5100 feet). 

 [Many specimens in M^Lach. Mus. and Mus. Comp. Zool. Cambridge, Mass. 



A very small undescribed species of Callibcetis (in M'^Lach. Mus.) from Florida has 

 whitish grey wings. The fore wing of the 5 is faintly amber-tinted in the marginal and 

 submarginal areas ; but in the d the membrane is devoid of ornamentation. I have seen 

 only 7 immature examples. 



Callib^tis rxDATUs, Pictet. 



Cloeundata, Pict., Hist. Nat. Nevropt. ii. Epliem. 26i, pi. xli. 5 (1813-5) ; Hag., Sraitlison. Miscell. 

 coll. (1861) Synop. Neuropt. N. Am. 5 [part.]. 



Cloeon undata, Walk., List of Neuropt. las. ia Brit. Mus. part iii. 575 (1853). 



A Mexican species, insufficiently described, and figured questionably ; but perhaps 

 admitting of re-identificatiou by collectors at some future time. Two kinds of Callibcetis 

 captured in Cuba by Poey, Gundlach, and Chas. Wright, are represented in Dr. Hagen's 

 collection, but too imperfectly for description. Pictet alludes to a species from the 

 same island. 



Caxlib^tis montanus, sp. nov. Etn. MS. in the writing of Plate XVI. 28 d (wings & 

 femur). 



Imago {dried), 2 . — Fore wings viti^eous, ornamented in the marginal, submarginal, and 

 the next adjoining areas with light raw umber-brown (fusco-luteous), the same colour 

 extending acro.ss the base of the wing iu proximity to the wing-roots, and varying in 

 mtensity distally, as well as in the proximal portion of the marginal area : nem-ation of 

 a like colour, or lutescent, excepting the rudimentary cross veinlets preceding the bulla 



