BY H. J. CARTER. 259 



these species show some affinity to Coripera. The shortness of 

 the antennae, especially of the third joint, together with their 

 subtriangular form mark a strong departure from the Australian 

 Adelia. It is for New Zealand or British entomologists to decide 

 as to whether the genus Pheloneis be finally accepted, but enough 

 has been said to show a strong combination of characters which 

 would prevent the so-called Adelia of New Zealand from inclusion 

 with the true Adelia of Australia. From an examination of the 

 Bates Collection in the British Museum, I would exclude also 

 the New Caledonian Adelia, all of which are expressly described 

 as having " the base [of prothorax] closely applied to the base of 

 the elytra," besides having the prosternal process, mesosternum, 

 and trisinuate base of prothorax quite different from any Austra- 

 lian Adelium. For the New Caledonian insects I would there- 

 fore suggest the name Neoadelium as applicable to A. nigro- 

 ceneum Bates, A. fairmairei Bates, A. marginatum Bates, and A. 

 .externocostatum Bates, A. caledonicum (Auct. 1 ?), A. pustulosum 

 Fauv.,(the last two unrecorded in the Munich Cat ; and the last 

 nom. praeocc.). 



Stridulation. — A character hitherto unrecorded in Adelium is 

 their power of stridulation. Mr. Sharp in the Cambridge 

 Natural History (Part ii. p. 264) records that in Praogena the 

 under surface of the head has the gular region striate for this 

 purpose, and adds " This is the only case in all the Tenebrionidse 

 in which any sound-producing organ has been discovered." In 

 the common Sydney species A. calosomoides (or genialel) a stridu- 

 lation is very marked. Mr. C. J. Gahan, an authority on this 

 subject as his excellent paper* shows, dissected several specimens 

 of Adelia in my presence, and showed the stridulating organs to 

 be oblique files or raised ridges near the apex of the upper surface 

 of the abdomen. These were present in the following species : — 

 A. geniale (or calosomoides), A. auratum, A. plicigerum and A. 

 licinoides, but were absent from A. porcatum and A. striatum. 

 I have noticed a similar, or even louder, stridulation when taking 



* Trans. Ent. Soc. Lond. 1900, p.433. 



