1888.] 33 



the fore-wing, between the costa and the radius, at nearly two-fifths of the distance 

 from the bullce towards the apex of the costal area, is a small blaokish cloud. In its 

 general colouring, this is more of a greenish-olive than the other species. 



Rivers in England. Summer. 



36. Ecdyurus volitans, Eaton : Revis., 291 (1887), = Heptagenia voli- 



tans, Cat., p. 10 ; Mon., 147, pi. vi, 20 [genitalia], = H. flavi- 

 pennis, var. ? volitans, Etn., Revis., 274 (1885). 

 Femora dark-banded in the middle and at the tip, more distinctly in $ than in 

 (? , especially in the hinder legs, where the $ lacks the median bands. Sides of the 

 thorax more decidedly or obviously lighter in colour than the dorsum than is the 

 case in the preceding species. Yenter usually spotless. The reticulation of the 

 ptcrostigmatic space is unusually open. 



Thames, near Reading. Summer. 



37. JEcdyurus lateralis, Curtis : Revis., 294 (1S87), = Heptagenia 



lateralis, Cat., p. 11 ; Mon., 155, pi. vi, 27 [genitalia]. 



A small species, about half the size of the other British species of the genus. 

 The sub-imago might be placed in cabinets among Cloeon simile or Ephemerella 

 ignita. The living adult has some resemblance to big specimens of Baetis vernus or 

 rliodani. The ? imago is liable to be confounded with small and ill-marked ex- 

 amples of Rhithrogena semicolorata ; but the pterostigmatic cross voinlets of the 

 fore-wing anastomose to some extent in the JEcdyurus, and the ventral lobe of her 

 ninth abdominal segment is sub-acute or entire. 



Lakes and trout streams. Summer. 



Shepton Montague Vicarage, 



Castle Gary, Somerset : 

 2Qth March, 1888. 



Carrion beetles attracted by Arum dracunculus. — The " snake arum " {A. 

 dracunculus, W.) is an exceedingly handsome plant, with its spotted stem, deeply 

 divided leaves, and great velvety spadices a foot or more in length, of the richest 

 maroon-purple inside : but its odour by no means recommends it for the garden, 

 being precisely that of very putrid flesh. Certain Coleoptera would appear, as has 

 long been known, to be as partial to this odour as to that of their proper pabulum. 

 In a garden at Eosia, where I lately had an opportunity of examining the plant for 

 the first time, I found, in a single spadix, besides flies of the genera Calliphora 

 (vomitoria, L.) and Scatophaga, quite a crowd of beetles, all carrion-feeders, viz. : 

 Creophilus maxillosus (2), Dermestes vulpinus (1), Saprinus, 10 specimens of three 

 species, the handsome S. semipunctatus, F., among them, and a species of Oxytelus 

 in great numbers. Other spadices contained the same beetles in equal plenty, so the 

 flowers ought to be most efllciently fertilized. — James J. Walker, H.M.S. 

 "Grapplcr," Gibraltar: Maij 22nd, 1888. 



