274 Mr. Curtis's Descriptions of some rare 



cells. These appear to be rather seated on the tube than a 

 development of it, though it is probable that there is a direct 

 and free communication between them. The cells are scattered 

 and always single, half a line in height, sessile, ovate, bulging 

 below, horny, vesicular, slightly compressed, smooth, with a 

 double keel down one side, each keel armed with from five to 

 seven spinous teeth, placed sometimes nearly opposite, and in 

 other instances alternating. The aperture is quadrangular, 

 terminal and wide, half closed with a thin membrane, and 

 furnished at each angle with a spinous denticle. 



Though the polypes are unknown, yet there can be little 

 hesitation, from the structure of the polypidom, in prognosti- 

 cating their affinity to those of the family Vesiculariadae. 



Fig. 1. Beania mirabilis, represented as it appears on one part of the 

 shell, considei'ably magnified. 



Fig. 2. Three vesicles, more highly magnified, to show their characters 

 more exactly. 



XXXII. — Descriptions, ^c. of some rare or interesting Indi- 

 genous Insects. By John Curtis, Esq., F.L.S., &c. 



Most of the following species have been named and recorded 

 in the * Guide to an Arrangement of British Insects ;' but as 

 no opportunity offered of describing them during the progress 

 of the ' British Entomology,^ some of them have been noticed 

 by other writers, who had not consulted the specimens, which 

 will render it necessary to give a few definitions, which it is 

 hoped will make it easy to identify them in future. The 

 numbers refer to the Guide, and all the insects are in the 

 cabinet of the author of the above works, excepting the Hy- 

 grotus and Chrysomela. 



Order COLEOPTERA. 



Fam. CARABID^. 



Genus 28. Dromius. 

 14. angustatus. 



My specimen is 1^ line long, but in other respects it agrees with 

 D. truncatellus , and I suspect the D. maurus of Sturm is only a va- 

 riety of the same insect. 



