28 WILLIAM G. DIIiTZ, M. D. 



On the specie!^ of IVIACROPN Kirb.y. inhabiting 

 North America. 



BY WILLIAM G. DIETZ, M. D. 



lu separating the smaller species of Listroderes Sch. under the 

 generic name Hyperodes, Mr. H. Jekel* apparently failed to recog- 

 nize the Kirbyan genus Macrops,t each having for its type Listro- 

 deres haniills Gyll. Lacordaire, in his classical work, merely men- 

 tions the genus| among the "Genres incertse sedis." Kirby, in his 

 description, speaks of the beak as being " shorter than the thorax." 

 This character, strictly adhered to, would exclude a number of species 

 evidently belonging here and lacking the essential characters of any 

 of the other genera of Phytononiini known to rue and necessitate 

 the foi'mation of one or several new ones, a course not calculated to 

 advance the interests of science, nor diminish the difficulties, already 

 too numerous, in the way of the student. A second character, "tarsi 

 not dilated," is only partially true, as the anterior tarsi of the males 

 at least, are moderately dilated in all the s})ecies. With these modi- 

 fications, increasing its scope, the genus retains all the characteristics 

 attributed to it by its author. 



Family CURCULIONID.E. 

 Tribe Phytonominl 



^'ent^al segments not very uneijual ; postociilar lobes of prothorax obsolete. 



PHYTONOMI. 



Articular surface of hind tibise well defined, terminal Phytonomus. 



Articular surface of bind tibite ill defined, oblique Lepyeus. 



Ventral sesjments very unequal, third and fourth short, united equid to one of 



the others LISTRODEEL 



Tibife strongly mucronate ; second joint of funiculus much longer than the 



first LiSTRONOTUS. 



Tibia; feebly mucronate; second joJTit of funiculus as long, or but little 

 longer than the first Macrops. 



* Annales de la Soc. Entom. de France, 18fi4, ]>. .538. 



t Fauna Boreali-Am. vol. iv, p. 199. 



X Genera des Coleoptcres, vol. vi, p. 622. 



