280 Analj/tical Notices of Books, 



such a method has indeed been commenced in the Horae Ento- 

 mologicas, and still further developed in the Annulosa Javanica*- 

 That the progress of the latter work should have been delayed, 

 has always been a subject for regret, and it is the more to be 

 lamented, since with its suspension, the views of many of its admi- 

 rers are still kept unsettled. But we do hope, that either through 

 its medium, or through some other channel, the system of Mr. 

 MacLeay will be propounded to the minutest possible details. 

 Even to those who still feel disposed to regard many of his 

 views as merely speculative, the general explanation of them 

 would doubtless be most acceptable. 



The only other entomological paper, is the '' Observations on 

 the Crepitaculum, and the Foramina in the anterior Tibiae of some 

 Orthopterous Insects : by the Rev. Lansdown Guilding." The 

 organ of sound in the male of the Locusta cameWfolia is described 

 as consisting of a strong ridge, furnished with hard and regular 

 teeth, on the under surface of the left hemelytron, near its base; 

 ^hich is rubbed against by a bony process projecting from the 

 right one. In those orthopterous insects which possess the crepi- 

 taculum at the base of the wing-cases, there is found a peculiar 

 organ on the anterior tibiae in both sexes ; in the Locustce^ Fab., 

 it is constituted by approximate suboval foramina, which are gib- 

 bous at the side ; and in the Achetce^ by two opposite oval flat- 

 tened openings, closed by a delicate membrane. A curious appa^p. 

 ratus on the anterior tibiae of many nocturnal Lepidopiera, parti- 

 cularly the Sphingidce^ is also mentioned. It is generally formed 

 of an elongate velvet pad, which varies in shape and size, and is 

 used, according to Mr. Guilding, to brush and cleanse the large 

 eyes of these insects. 



It now remains to mention only one other paper, a " Notice on 

 a peculiar property of a species oi Echinus : by E.T. Bennett, Esq." 

 It states the occurrence in immense quantities on the western 

 coasts of Ireland, of a species of Echinus^ which forms for itself 

 depressions in the rocks immediately above the low-water mark, 

 and in which nearly two-thirds of the animal are constantly im- 

 bedded. The common E. esculentus is met with upon the same 

 shores, but is never found in similar cavities. The species ap- 



