THE ENTOMOLOGIST. 253 



hoppers : the latter were numerous in the grassy spots 

 adjoining the sands, and were carried off by the Asihis, 

 which flew with its prey down to the sands, and there 

 devoured it. The species had been determined by Mr. 

 Verrall to be the Asilus albiceps of Meigen, and belongs to 

 Loew's subgenus Philonicus, the only other described species 

 of Philonicus being the P. dorsiger of Wiedemann, from 

 Egypt. Mr. Smith added that Asilus crabroniformis was in 

 swarms at Woollacombe, but appeared to confine its attacks 

 to small Diptera. 



Monograph of Epliemerid(B. — Read, the first part of a 

 Monograph of Ephemeridse, by the Rev. A. E. Eaton. After 

 enumerating the various collections which he had had the 

 opportunity of consulting, the Author gives a bibliographical 

 history of the group from the time of Clutius (1634) to the 

 present day, indicating under each book the species therein 

 for the first time named and characterized, and, when 

 possible, the places where the type specimens, if extant, are 

 deposited. Then follows a list of all the described species 

 arranged in the alphabetical order of the genera; together 

 with remarks on the fossil species, and a list of names of the 

 fossils hitherto reputed to be Ephemeridse. In the next 

 portion of his paper, the Author gives the generic characters 

 and habits of the Family, followed by Tables of the geogra- 

 phical distribution over the globe of both genera and species, 

 and arrives at the couclusion that " the number of described 

 recent species of Ephemeridae is about 178, exclusive often, 

 which are either hardly determinable or probably mere con- 

 ditions of well-characterized forms which have been otherwise 

 named ; there are three fossil species determinable." The 

 whole of the recent genera and species (including four new 

 genera, and twenty-five new species) are then characterized; 

 and the descriptions are elucidated by numerous drawings of 

 structural details. On a future occasion the Author hopes to 

 give a detailed account of the organization and development 

 of some characteristic British species of the Family. 



Notable British Lepidoptera. — Mr. W. C. Boyd exhibited 

 some varieties of several British Lepidoptera: amongst them 

 a female Colias Edusa, with the black spot on the front 

 wings almost obliterated, captured in the Isle of Wight in 

 1869; a dwarf Pieris Rapse, captured at Cheshunt; a dwarf 



