October, 1872 ] 97 



NOTES ON HETEROMERA, AND DESCRIPTIONS OP NEW GENERA 

 AND SPECIES (No. 1). 



BY F. BATES. 



Aetenis, mibi, Trans. Ent. Soc, 1868, p. 309. 



It was suggested to me Ipy Dr. Le Conto, wlien going through my 

 collection, that this genus should, by its elongate metasternum and 

 winged condition, be placed with the Epitragides of Lacordaire. Dr. 

 Miiklin, in the Stett. ent. Zeit., 1S72, p. 247, has also expressed the 

 same opinion, giving as its nearest ally the genus Sphenaria o£ 

 Menetries. I still think, however, that this genus cannot be removed 

 from the vicinity o£ Evaniosomus, Gruerin. The narrow, elongate 

 head, with its supra-orbital carena ; the strongly produced epistoma, 

 uniformly continuous with the front ; the elongate and very prominent 

 antennary orbits, which are rigidly marked off from the rest of the 

 head by a deep sulcus ; the elongate palpi ; the prothorax, with its 

 pronotum continuous with its flanks ; the elongate, slender tarsi 

 (having the first joint of the two jjosterior pairs much larger than the 

 last) channelled beneath and ciliate with short, spiniform hairs ; are 

 strong characters j^ossessed by this genus in common with Evaniosomus. 

 The eyes are certainly much larger, and are approximate beneath. 

 The elongate metasternum and the wings are also exceptional ; but 

 even these characters are met half-way in the genus GJiorasmius (a 

 genus I have proposed— Trans. Ent. Soc, 1868, p. 310, note — to re- 

 ceive Evanioso7nus p'Tocerus, Er.), which has the metasternum nearly 

 double the length, as in Evaniosomus, and the wing-cases open (not 

 connate). I possess, moreover, a second species of Aryenis {A. Unagi, 

 niihi i. I.), which still more closely approximates this genus to Clio- 

 rasmius, and, through the latter, to Evaniosomus. 



I think it will be found that Lacordaire throughout his work has 

 attached too much value to the relative length of the metasternum as 

 a character in classification ; certainly, to remove Argenis from close 

 proximity to Evaniosomus would be a violent severance of very natural 

 affinities. 



Ancylopoma, Pascoe, Ann. Mag. Nat. Hist., 1871, p. 354. 



This genus must be referred to the Heterotarsides of Lacordaire ; 

 it should be placed after Ancedus, Blanch. 



AcANTHOSTERNUS, Moutrouz., = Diphgrrhguchus, Eairmaire. 



This opinion, however, is dependent on the genuineness of so-called 

 types I had fi-om the collection of Done. 



