122 EET. A. E. EATOX OX EECEXT EPHEMERID.E OK MAYFLIES. 



Distribution. Algarve and Portugal. 



Etymologij. koXoc and apKvc, from the completeness of the reticulation of the wings. 



Upon reconsideration, I am disposed to transfer to Thraulus, provisionally, the species 

 referred provisionally to the present genus in the writing of PI. XIII., because the 

 relative lengths of the intercalary nervures of the axilar-anal interspace of their fore 

 wings correspond more nearly with those of the typical Thraulus than with those of 

 the typical Calliareys, and also because their 6 forceps-bases are entire. The oblique 

 acuminate prolongation of the marginal areas of the hind wiugs of these species led, 

 doubtless, to their being classed otherwise in the first instance. It is exti-emely probable 

 that they constitute a genus of their own ; but the materials at hand do not suffice for 

 its definition. 



Caxliarcys HmiLis, Etn. Plate XIV. 23 (wings, legs, and genitalia). 

 Calliareys humilis, 1 Etn., Ent. Mo. Mag. xviii. 21 (June 1881). 



Siibimago (dried). — Wings ivory-black grey. 



Imago (dried), d . — Thorax jet-black above. Abdomen pitch-brown, with joinings 2-6 

 narrowly pale. Setae light warm sepia, with piceous or reddish joinings. Porceps in 

 opaque view light pitch-brown, changing in transmitted light to translucent bistre-brown ; 

 the divisions of the forceps-basis singularly prolonged at the points. Fore legs in opaque 

 view piceous, in oblique view reflecting rufo-piceous, and in transmitted light translucent 

 golden-brown amber (like resin or treacle) ; hinder legs somewhat lighter. Wings trans- 

 parent, with light pitch-brown neuration, changing to brownish atnber in transmitted 

 light ; the membrane is tinted perceptibly with a similar but faint light-brownish grey : 

 in the marginal area of the fore wing are 6-7 cross veinlets before the bulla, and 13-18 

 almost always simple and slightly curved beyond it, all well defined. Lengtb of body, 

 (S 2 7-9; wing, d 7-8-5, $ 9; setse, d im. 10-11-5 millim. 



Sab. Algarve, on the northern slopes of Poia near Monchique, at altitudes of little 

 over 2000 ft. (e. g. common near the waterfall at the foot of the final slope, at about 

 2150 ft.), at the end of May ; also in Portugal, in the Estrella, on a hill south of Sabu- 

 gueiro, at an altitude of about 4100 ft., early in June ; in streams having a temperature 

 at that season of o& Pahrenheit. 



Section 6 of the Genera. — T\-pe of Ephemerella. Adult. — Pronotum of $ traversed 

 lengthwise by a raised median line or ridge ; its posterior border arched, and either 

 truncate or slightly depressed in the middle. Hind tibia rather shorter than the femur ; 

 the tarsus about f as long as the tibia. In the fore wing the anal (8) and first axillar (9^) 

 nervures are connivent and mutually contiguous at the wing-roots, apart from the second 

 axillar (9-) and pobrachial (7) nervures. Penis-lobes distinct ; orifices of the seminal ducts 

 terminal; no stimuli apparent, ^yrnph \_Teloganodes \xnknovfn\. Terminal margins of 

 the fore wings connected with the peak of the mesonotum, each by a distinct triangular 

 membrane. Palpus of the 1st maxilla (when present) shorter than the lacinia, which is 

 crowned with a sparse tuft of hair and armed with spinules along its inner edge. Lobes of 

 the labium small, rounded, and subequal to the laciniae of the 2nd maxillae. Abdominal 

 tracheal branchiae fewer than the maximum number in the Familv, beins' absent from the 



