1S74.] lOl 



the marginal row of ocellatcd punctures is not on the extreme margin 

 as in Carenum, nor moved towards tbe diac as in Neocaremim, but lies 

 just above the marginal furrow. Tbo ventral segments Lave no punc- 

 tures, and the suture between tlae second and third is complete. 



Nicol Bay. 



Obs. — All the above new species of the Carenum group were ob- 

 tained from the reserved collection of M. Du Boulay, in which they 

 were nearly all represented by single specimens. From the same col- 

 lection I obtained other species, allied to the common G. marginatum 

 and C. Bonellii, but it is almost impossible to ascertain whether some 

 of the numerous descriptions published by Mr. W. MacLeay and 

 Count Castelnau do not apply to them. 



Bartholomew Eond, Kentish Town, N.W. : 

 Juli/, 1874. 



ON A NEW FAMILY OF EUEOPEAN AQUATIC COLEOPTERA. 

 BY D. SHABP, M.B. 



Some few weeks ago I received a letter from Dr. Lcconte, of 

 Philadelphia, in which he enclosed two specimens of a minute Coleop- 

 terous insect. These two specimens had been captured by the late 

 Mr. Gr. E. Crotch in Southern California, and Dr. Leconte specially 

 directed my attention to them as being of great interest, inasmuch as 

 he considered them to be representatives of a new family of Clavicorn 

 Coleoptera. When the specimens reached me, they had unfortunately 

 entirely lost their heads and thoraces ; nevertheless, the insect inter- 

 ested me even more than Dr. Leconte had anticipated ; for I felt sure, 

 from the fragments that had reached me, that not only was it the 

 representative of a new family of Coleoptera, but that that family was 

 an inhabitant of Europe as well as of North America. I accordingly 

 wrote to Dr. Leconte, informing him of the accident that had occurred 

 to his specimens, and of my suspicion that an allied insect was a native 

 of Europe, and, on receipt of my letter, he was so kind as to forward 

 me two other specimens of his Uijdroscapha nataiis, as well as a proof 

 slij) of his description lliercof. I lliiuk it well to preface my obser- 

 vations on this insect by giving verbatim Dr. Leconto's description 

 of it. 



" HYDKOSCAPnA, n. fj. {Hydroscaphidcc) , Lcconte. 



" Head moderately large, eyes lateral, coarsely {:jranulatcd, somewhat transverse ; 

 antenna; scai-cely longer than the head, inserted inider the edge of the front, with 

 Bcvon distinct joiuts ; Ist stouter, 2ud and 3rd each as long as the first, but narrower, 



