CENTROPTILUM.—CHIROTONETES, 15 
1. Centroptilum 2 
Hab. Mexico, N. Sonora (Morrison; one 2 imag.). 
The intercalar veinlets at the hind margin of the fore wing of this species are single. 
CALLIBATIS. 
Callibetis, Haton, Ent. Monthly Mag. xvii. p. 196 (1881); Rev. Mon. Ephem. p. 19], t. 16. 
figg. 28 a—d (adult details) and t. 48 (nymph) (1884-5). 
A genus apparently numerous in North and South America, found also in Australia. 
1. Callibztis pictus. 
Baétis pictus, Eaton, Trans. Ent. Soc. Lond. 1871, p. 122, t. 5. fig. 27 (detail) '. 
Callibetis pictus, Raton, Rev. Mon. Ephem. p. 195, t. 16. fig. 28 ¢ (adult details) (1884-5) 
? Cloé undata, Pictet, Hist. Nat. Néuropt. ii., Ephém. p. 264, t. 41. fig. 5 (1843-5) * 
Hab. Norta America, Texas !2, California 2,—Mexico?4, Amecameca in Morelos 
(F. D. Godman), Orizaba (H. H. Sinith); Guatemaua, near the city, Aceytuno 2 (Salvin), 
Duefias, Capetillo (Champion). 
2. Callibetis montanus. 
Caliibetis montanus, Haton, Rev. Mon. Ephem. p. 196, t. 16. fig. 28d (adult details) (1884-5). 
Subimago (dried).— 9 . Wings bistre-grey, transparent, tinged with raw umber-brown in the darker parts 
along the anterior margin and near the base. Neuration raw umber-brown, excepting some of the cross- 
veinlets in the disk nearest to the wing-roots, and the weaker of those in the marginal area, which are in 
some lights whitish. The whitish cross-veinlets in that area are narrowly bordered with whitish. Seta 
light brown, with darker joinings. 
Length of wing 8 millim. 
Hab. Guatemata, Aceytuno 5100 feet (Salvin; one 9 imag. in Mus. McLachlan), 
Duefias (Champion; one 2 subimag.). 
Another species of Callibwtis is represented in Messrs. Godman and Salvin’s cullec- 
tion by a 2 subimago, labelled N. Sonora, Mexico (Morrison). It resembles C. mon- 
tanus in size, but is of a lighter colour and has fewer cross-veinlets in the marginal 
area of the fore wing. 
CHIROTONETES. 
Chirotonetes, Katon, Ent. Monthly Mag. xviii. p. 21 (1881); Rev. Mon. Ephem. p. 208, t. 18. 
figg. 33 d-e, t. 19. figg. 33 a, b,? ¢ (adult, details), and t. 49 (nymph) (1884-5). 
Most of the few species known of Chirotonetes are North American; but the genus 
