Tricliopteryx.] CLAVICORNIA. 115 



af. Elytra shorter, subquadratc, broadest 



behind middle T. BREVIPENITIS, Er. 



bf. Elytra longer, ovate, broadest about 



u "ddle T. KIRBII, Malik. 



b. Anterior tarsi of male not dilated, 

 a* Pubescence short. 



af. Elytra not narrowed behind, oblong or 



subquadrate. 

 aj. Posterior angles of thorax much 



produced T. CANTIANA, Matth. 



bj. Posterior angles of thorax not pro- 

 duced T. VOLANS, Matth. 



bf. Elytra nai-rowed behind, oval. 



aj. Thorax more narrowed from base 

 to apex ; sculpture less pronounced ; 



antenna? shorter T. BOVIXA, Mots. 



bj. Thorax scarcely narrowed from base 

 to apex ; sculpture more pronounced ; 



antenna; longer T. LONGTILA, Matth. 



b*. Pubescence longer. 



af. Size larger; elytra moderately long ; 

 thorax with rather large tubercles, sides 

 very finely margined ; pubescence 



fuscous T. SEBICANS, ffeer. 



bf. Size smaller; thorax more plainly 



margined; elytra very short, 

 aj. Thorax with rather large tubercles ; 

 elytra deeply asperate, margined ; 



pubescence fuscous T. BRETIS, Mots* 



bj. Thorax with very small tubercles ; 

 elytra feebly asperate, not margined ; 



pubescence whitish T. CHEVBOIATII, All. 



2. Antennae yellow, or pitchy-yellow. 



A. Colour entirely castaneous or fusco-castaneous. 



a. Thorax with sides almost straight, strongly 



tuberculate, head broad T. AMBIQUA, Matth. 



b. Thorax with sides distinctly narrowed iu 



front, feebly tuberculate. 

 a*. Form very convex ; head very broad ; 



eyes small ; elytra not dilated behind in 



female T. POWEEI, Matth. 



b*. Form rather depressed; head narrower ; 



eyes large and prominent ; elytra strongly 



dilated behind in female T. DISPAK, NalUi. 



B. Head and thorax black or pitchy-black ; 



elytra castaneous. 



a. Elytra longer than head and thorax . . . T. GTTEEINII, All. 



b. Elytra not longer than head and thorax . T. OBSC&INA, Wall. 



C. Head and thorax black, elytra yellow 



testaceous ; sculpture very faint T. WATEBHOUSII, Matth. 



D. Head and thorax black, elytra brownish-black. 

 a. Head longer ; thorax smaller ; sculpture 



distant T. MONTANDOXII, All. 



* This very rare species appears occasionally to have the antennae yellowish ; in my 

 specimen, however, they are decidedly pitchy. 



i 2 



