Mr. A. Adams on the Genus Alaba. 293 



ad Portum Novum crescentium a Dom. Bewicke nuperrime re- 



pertus. 



Eutriptus putricola, Woll., Trans. Ent. Soc. Lond. (3rd series) i. 159, 

 pi. 7. f. 7 (1862). 



E. cylindrical-oblong, deep black, and exceedingly shining. 

 Head and -prothorax most minutely and obsoletely punctulated : 

 the formei' with the forehead depressed and the frontal line en- 

 tire ; the latter very narrowly margined at the sides, with the 

 p'osternal lines almost parallel, or very slightly approximating at 

 about their middle point. Meso- and meta-sterna impunctate ; 

 the former deeply excavated anteriorly, and with the line within 

 its front and lateral margins continuous. Elytra each with two 

 very obscure oblique humeral striae ; with two sublateral ones, 

 deeper and almost entire; with four much lighter, remotely 

 punctured, and more or less abbreviated ones on the disk ; and 

 with a deeper sutural one, evanescent anteriorly at about a third 

 of the distance from the scutellum. Antenna testaceous ; their 

 scape and the legs piceous : the last with their anterior tibia 

 curved and dilated, with three small anguliform teeth along their 

 outer edge, and with their inner apical angle produced into an 

 elongate, curved, outwardly directed spine. 



Four examples of this insect were captured by Mr. Bewicke 

 from out of the rotten branches of Euphorbias, which he obtained 

 from Porto Novo, a few miles to the eastward of Euuchal, during 

 June of the present year. Although locally abundant at the 

 Canaries in similar situations, there is no reason to suspect that 

 it is anything but exceedingly rare in Madeira ; for in a letter 

 received lately from Mr. Bewicke, he states, — " I had a man's 

 load (a sackful) of Euphorbia-stems, from Porto Novo, and al- 

 though the very first stick I examined produced me four speci- 

 mens of this new member of the Histerida, the whole sack 

 contained no more.'' Two of these Mr. Bewicke sent me for 

 inspection, one of which he has presented to the collection of 

 the British Museum, and the other to the Madeiran cabinet at 

 Oxford. 



[To be continued.] 



XXIX. — On the Animal and Affinities of the Genus Alaba, with 

 a Review of the known Species, and Descriptions of some new 

 Species. By Arthur Adams, F.L.S., &c. 



This group of Laminarian Mollusca, which seems to represent 

 the pelagian genus Litiupa, was first recognized by my brother 

 and myself in our ' Genera of Recent Mollusca.' We then 

 considered it a subgenus of Cerithiopsis ; but having had an 

 opportunity in Japan of observing the living animal, I find it 



