248 MEMOIRS ON THE COLEOPTERA 



as in Typocerus. [Type X. corusca n. sp.]. Pacific to Atlantic 

 regions Xestoleptura 



Tarsi not notably hairy above 10 



10 Third hind tarsal joint slender and elongate, emarginate at tip; 

 elytra with feebly arcuate sides to the apices, dark, evenly quadri- 

 fasciate with bright yellow; body small in size. [Type Lept. 

 tribalteata Lee.]. Pacific regions Stenostrophia 



Third hind tarsal joint shorter and deeply bilobed, a little less abbreviated 

 sometimes, as in the aberrant matthewsi Lee 1 1 



II Body relatively short and very stout in form, the prothorax trans- 

 verse, usually strongly angulate at the sides; elytra rounded at the 

 sides to the apices, black, transversely but irregularly fasciate with 

 bright yellow. [Type Lept. Iceta Lee.]. Atlantic to Pacific regions. 



Strophiona 



Body more elongate, the elytra longer and generally more cuneiform, 

 the ornamentation never transversely fasciate; prothorax well 

 developed, generally more or less transverse and prominent at the 

 sides. [Type exclusively European]. Atlantic to Pacific regions. 



Leptura 



12 Front very broad, briefly produced; prothorax very strongly bi- 

 impressed; legs long, the third hind tarsal joint bilobed; metepi- 

 sternum normally broad; body with strong Ophistoma-\ike habitus, 

 alutaceous throughout. [Type Lept. scalaris Say]. Atlantic regions. 



Bellamira 



13 Front broad and short before the antennae; body rather obese; 

 prothorax biconstricted, the elytra narrowed behind with arcuate 

 external outline, convex, ornamented with spots transversely ar- 

 ranged; legs only moderately elongate; third hind tarsal joint but 

 slightly elongate, bilobed. [Type Lept. velutina Oliv.]. Atlantic 

 regions Typocerus 



Front narrowed and more or less strongly produced; body slender; 

 prothorax not biconstricted, the apex with only the apical beading; 

 elytra attenuate behind, with more or less sinuate external outline, 

 the ornamentation variable; legs long, very slender, the third hind 

 tarsal joint generally very slender, elongate, emarginate at apex. 

 [Type assumed 0. julmcornis Bates]. Neotropical and neosub- 

 arctic regions. Strangalia Lee. and Horn Ophistomis 



Some use has been made above of the form of the third hind tarsal 

 joint, which is greatly diversified and somewhat variable even 

 within the restricted genera here denned, so that its real value is 

 by no means definitely fixed. In matthewsi, for example, it is not 

 so short as in other forms of Leptura as here limited, but that species 

 is aberrant in having the tibial spurs slightly ante-apical, to some 

 degree recalling Stenocorus. There are about fifteen described 

 species in the old Leptura complex that I have not seen, but these 

 can readily be assigned to the above genera by those possessing 



