306 



obliteration of the second incisure permits greater latitude, and in tlie 

 present instance tlie apparent articulation may prove imperfect. The 

 form of the head is Hydradephagous. The perfectly supine aspect of 

 the eyes, the insertion of the antennae in a completely inferior exca- 

 vation, and the impressed mentum, give a resemblance to Gyrinidge ; 

 but, judging from figures and not from actual inspection, the maxillge 

 are more those of Dyticidae verging to the Carabideous form. The 

 movement of the hind thighs in a lateral cavity of the postpectus and 

 the truncate elytra also resemble Gyrinida? ; but the structure of me- 

 sosternum and position of middle legs are quite unlike that family, and 

 agree better with Dyticidae than Carabidaj, although the postpectus 

 has less than typical development. The structure of praesternum and 

 its relation to mesosternum are peculiar, departing from the ordinary 

 Dyticideous types even as the insect departs from the aquatic habitat. 

 The species seems to come very near that figm-ed by Mr. Hope, but 

 the greater enlargement of the femora and singularity of the hind tro- 

 chanters give it a peculiar character. On the whole, my present im- 

 pression is that it comes much nearer to Dyticidae than to any other 

 family, though differing from the other sections of that family more 

 than they do among themselves ; and secondly, that the aberrant ten- 

 dency is towards Gyrinidae and not Carabidae. 



Ventral segments 6 : maxillee witli horny \ahes, inner one ciliate 



internally, &c •. Adephagous. 



The basal ones connate, .*. not Gyrinidae. 



Antennae glabrous and tarsi (posterior) compressed, .*. Hydradephagous. 

 It remains only provisionally to place it in ... .•. Dyticidae. 



— A. H. Haliday ; Clifton, near Holywood, Aiig. 20, 1841. 



[The above notes by Mr. Haliday occur in a letter from that gentleman in reply 

 to an enquiry of mine as to his opinion of the affinities of the singular genus Adeloto- 

 pus. Mr. Davis, of Adelaide, sent me several species of this and cognate genera, tic- 

 keted as having been found under the bark of Eucalypti. My own doubts as to the 

 correctness of the situation assigned to Adelotopus induced me to make this enquiry, 

 believing Mr. Haliday, of all living entomologists, to be the most capable of forming 

 a just decision on the subject. The species appears to me identical with that de- 

 scribed and figured by Mr. Hope in the 1st vol. of ' Transactions of the Entomological 

 Society of London.' E. iV.] 



149. Lasiocampa Ruhi. The larvae of this moth have been very 

 plentiful near Lavenham, but all attempts to rear the perfect insect 

 from them have failed. — W. Gaze ; Lavenham, January 9, 1842. 



[Mr. H, Doubleday has been successful in rearing a large number of this moth 

 from the caterpillar state : will he be kind enough to explain to the readers of ' The 

 Entomologist ' the method he has adopted ? — E. iV.] 



