EEV. A. E. EATOX ON EECENT EPHEMEEID.E OE SIATELIES. 207 



neui'ation, tinged sometimes Avith fuscous towards the costa [Walsh, 1863], or at tlie 

 extreme base of the costa [id., 1862]. Pore leg, as a rule, about as long as the body, 

 variable in coloration; femur obscure greenish at the base, fuscous in its terminal half; 

 tibia varying from a pale greenish with both its extremities obfuscated, to a uniformly 

 dark fuscous or brown black ; tarsus fuscous, with the basal halves of the joints pale. 

 Hinder legs greenish white, with the tips of the tarsi a little cloudy. [After Walsh.] — 

 The forceps-basis terminates distally in a shallow sinus, which leaves on each side of the 

 distal border a short, moderately broad projection terminated by the forceps-limb. Penis- 

 lobes obliquely acuminate. 



? . Eyes in life ferruginous, bisected by a broad yellowish band. Vertex yellow, 

 sometimes with a yellowish vitta. Body, when different in markings from the d , almost 

 uniformly ferruginous. Wing-nervures pale fuscous, excej)ting those meeting the inner 

 margin of the fore wing. Pore leg entirely fuscous, excepting the basal halves of the 

 tarsal joints, which are pale. Length of body 9-13 ; wing, d 10'5-12, ? 11-15 ; setse, 

 6 im. 18-23, subim. 12-11, ? im. 17-26, subim. 10-11 mm. 



Hab. North America ; Rock Island, 111. (Walsh); Washington, D.C. (Hag.); Indiana 

 (Say), about the middle of June. 



Chirotonetes intermedius, sp. nov. 



Imago (dried), d . — Notum intense raw-umber brown, rather lighter in the middle in 



advance of the peak of the mesonotum (perhaps in consequence of pinning). Abdomen 



intense burnt-carmine purple, marked with yellowish white on the dorsum and venter ; 



the dorsal markings are in segments 2-8, a large spot at the base of every segment on 



each side, and a very small indistinct spot or abbreviated streak in the middle of the 



base ; the lateral spots of the dorsum increase successively in size jiosteriorly, those in 



segments 2-4 are somewhat rounded behind, and those of segments 5-8 (oblique, subtri- 



angular and obtuse) extend from the base to about f of the length of the segment, and 



leave in the hinder lateral angles of the dorsum triangular patches of the dark grovind- 



coloiu" in continuity with the colouring of the hinder border; in the corresponding 



ventral segments the anterior lateral angles are occupied each by a small yellowish white 



triangular spot ; segment 10 and the forceps-limbs light dull yellowish brown, mingled 



ivith reddish purple ; forceps-basis and the nearer portions of the setae light reddish 



Dm-plish, the joinings of the setse thereaboiits opaque, or burnt- carmine, the remainder 



)f the setae imiformly dull yellowish white. Porceps-basis similar in form to that of 



Uh. siccus ; but a difference from that species is noticeable in the penis, the lobes being 



nore rounded at the tip, and less broad, so that their form is recognizable within the 



?ap in the forceps-basis. Pore leg about f as long as the body ; the femur and tibia in 



•paque view pitch-brown, except the inner side of the former from the base to about the 



oiddle, which is translucent light raw-umber ; in oblique view the pitch-brown becomes 



ighter; tarsus in opaque view light brownish Indian-red, changing in oblique light 



Imost to light bm-nt-sienna ; in transmitted light the ungues, first tarsal joint, and the 



ale part of the femur are equally translucent whitish amber, the tibia and remainder of 



tie tarsus opaque, and the femur is largely tinged with reddish purple. Hind legs in 



