EEV. A. E. EATON ON EECENT EPHEMERID.E OE MAYFLIES. 321 



P. 186, 1. 15 from top, for Teneriffe, common near the Jardin, read common in a 

 Fonda at Puerto de la Orotava, Tenerife, and near the Jardim. 



This relates to Chirotonetes (?) obnatus, p. 208. 



Stibimago (dried). — Wings whitish grey; fore wings less yellowish at the roots than in 

 Colobtirus Jmineralis, having a small yellowish spot at the roots of the snbcosta ; cross- 

 veinlets bordered with brown-black (corvinous), their bordering confluent here and there 

 into spots producing an irregular chequered appearance amongst the reticulation. Setae 

 warm sepia-brown, with dark joinings. 



Imago {dried). — Notum of 6 black or pitch-brown ; that of 2 fusco-luteous or brown- 

 ochreous. Dorsum of abdomen rufo-fuscous, with a dark triangular spot behind on each 

 side of every intermediate segment, before the apex of which is an ochraceous sjraee 

 [ = ? a lateral series of oblique dark stripes each enclosing a pale space]. Setas fuliginous 

 or warm sepia-grey with darker joinings. Antepenultimate [? ventral] segment of $ 

 usually conspicuously paler than the others, and traversed lengthwise by three black 

 lines. Eore legs brown-ochreous, the hinder legs flavescent, with black or dark-grey 

 markings, viz. : — a Ijand in the middle and another at the tip of the femur, the tip of the 

 tibia, the joinings and, to a large or small extent, the last three joints of the tarsus. Wings 

 vitreous ; fore wing faintly yellowish or amber-tinted in the first portions of the marginal 

 and submarginal areas, and tinged with brown-black in the pterostigmatic region, where 

 the cross-veinlets are dark-bordered, simple, and straight : neuration for the most part 

 pitch-black, but the subcosta and radius are yellowish towards the base. Length of body 

 11-1.5, wing 12-16 ; setae 6 and ? itn., 16 and 1, subim. <3 about 13, 2 11 mm. 



Hah. Christchurch, New Zealand. Easily distinguished from Coloburus humeralis by 

 the dark-bordered cross-veinlets of the wings forming here and there irregular blots, by 

 the smaller extent of the yellowisli tint at the wing-roots, and by the banded femora. 

 Described and illustrated by me in 1876 after specimens at that time in the M'Lach. Mus. 



P. 210, 1. 11 from bottom, add and Europe. 



P. 216, 1. 1 from bottom, add I have lately seen, in Mr. Albarda's collection, a single 

 cJ subim. captured by Meyer-Diir at the same place. The Portuguese nymph figured in 

 PI. L. is probably of this species. These nymphs were plentiful in a streamlet near Sao 

 Barnabe in Algarve at an altitude of 700 ft. [water 61° E., 12th May, 1880, in the after- 

 noon], and there were sloughs relinquished by the subimago on some of the stones in the 

 stream ; but I failed to find the fly. 



P. 232, 1. 6 from top add :— 



A fragmentary d imago, probably of this species, forwarded to me, without record of 

 locality, by M. Erey-Gessner, differs from the s])ecimen described at p. 231 siijira and 

 figured in detail in PI. XXII. in the following particulars : — Many of the cross-veinlets 

 of the pterostigmatic portions of the marginal areas of the fore wdngs are forked near 

 the costa and some of them anastomose with one another ; the two short intercalary 

 nervures in the anal-axillar interspace of the fore wing, which are next to the 1st axillar 

 ncrvure, end inwards abruptly; the narrow linguiform penis is entire, not incised at the 



43* 



