THE CANADIAN ENTOMOLOGIST. 251 



mongolica, Wasm. Between the last-named two species the sides of the 

 thorax and the form of the posterior angles differ just as between 

 Myrmobiota and Homceusa ; in the first-named two species it differs 

 even more. 



Therefore, I conclude, if we accept the differences between Homozusa, 

 Soliusa and Myrmobiota with Mr. Casey as generic ones, we would 

 be obliged to create new genera for most of the '■''good species " among 

 Lomec/iusa, Atemeles, etc. But this system cannot be adopted, because 

 the number of genera would increase ad infinitum without necessity. I 

 prefer, therefore, to consider Myrmobiota crassicoruis and Soliusa 

 crinitula, Cas., as good species of the old genus Homozus-a, Kraats. 



The host of Soliusa crinitula, with which Mr. Wickham found my 

 specimens, is Lasius americanus, Em., a race or variety of Lasius niger, 

 L., with which our European Homceusa acuminata, Mserk., is living. I 

 have also a specimen of Soliusa crinitula, found by Prof. W. M. Wheeler 

 with Las. aphidicola, Walsh, at Colebrook, Conn. 



2. In the same paper (Journ. New York Ent. Soc, VIII., n. 2, 1900, 

 p. 55) Mr. Casey creates the new genus Chitosa for Dinarda nigrita, 

 Rosenh., living with Stcnamma ( Aphceuogaster) testaccopilosum in the 

 Mediterranean region. I had D. nigrita in my collection already, long 

 ago, and intended to describe it as a new sub-genus of Dinarda, the 

 peculiar form of the ligula being quite identical with Dinarda Hagensi, 

 dent at a, etc. But I must confess that the extraordinary structure of the 

 basal joint of the posterior tarsi, which Casey has described very well, is 

 a sufficient character for a new genus sensu stricto, the more as it is 

 connected with other important differences in the structure of the 

 antennas and of the prothorax. 



The last four joints of the posterior tarsi in Chitosa seem to be 

 in a process of degeneration, which would conduct finally to the very 

 extraordinary form of the tarsi as described in the genera Sympolemon, 

 Wasm., and Doryloxenus, Wasm. (Congo and S. Africa). It would be 

 very important to know if Dinarda clavigera, Fauv. (Revue d'Entom., 

 1899, p. $$), from Abyssinia belongs also to Chitosa. 



3. In his Coleopterological Notices, V., p. 321 and 327, Mr. Casey 

 described a new genus of Aleocharini, Nototaphra, allied to Myrmcdonia, 

 Er. One of the two species of this genus, Nototaphra lauta, Cas., 

 had been sent to me by Mr. E. A. Schwarz and Mr. Theo. Pergande as a 

 new species found with Tapinoma sessile, Say, in Massachusetts by Mr. 



