Till': CIIKCKKKKI) J?EI<7PMiS. S4!) 



h. Hind tarsi rather broadly dilated; thorax \vitli at must a nar- 

 row shallow groove near apex, and without a median line. 



A'. ENOCLERTS. 



Mi. Hind tarsi slender and longer; thorax with a very deep sub- 

 apical groove and with a median impressed line. 



VI. THANASIMUS. 

 (hi. Eyes entire. 



i. Anteunal club gradually formed, 3-jointed ; elytra bright red. 



VII. ZENODOSUS. 



ii. Antenual club small, subgloboso, 2- join ted ; elytra black or black 

 and dull yellow. VIII. HYDNOCERA. 



I. MONOPHYLLA Spin. 1*41. (Gr., " single + leaf.") 



Eyes deeply emarginate in front, nearly divided ; maxillary 

 palpi cylindrical : last joint of labial palpi strongly dilated, hatchet- 

 shaped ; tarsi elongate, distinctly five-jointed; claws bidentate. An- 

 tenna 1 with terminal joint large, compressed, about equally as long 

 (female) or very much longer (male) than all the preceding joints 

 combined. Three species are known from North America, one of 

 which occurs in Indiana. 



1621 (r>]27). MONOPHYLLA TKH.MIXATA Say, Bost. Journ. Nat. Hist., I, 1835, 

 160; ibid. II. C.::T. 



El'ingate, subcylindrieal. IHack. moderately shining; 

 thorax yellow with a large or small discal black spot; ely- 

 tra 1 Hanks I'm in humeri to middle and a transverse spur at 

 middle (the latter sometimes wanting) yellow; abdomen en- 

 tirely yellow, male, the apical i sixth) ventral segment black, 

 female. Pubescence of elytra and abdomen grayish, m id- 

 erately sparse, of thorax yellowish; that of discoidal spot 

 and of occiput of head black, moderately long, dense and 

 erect. Thorax cylindrical, longer than wide; its disk and 

 that of elytra rather marsely, densely punctate. Length 4- 



I' \'I, OOJ. IVullC. 



7 mm. (Fig. 330.) 4. 



(Original.) 



Posey County; rare. June 4- June 6. 



Tillus collaris Spin., is known from Georgia and Texas, and has 

 been taken by Dury near Cincinnati. It is black, the thorax en- 

 tirely or with disk" red: length ;>-.").;"> mm. 



II. CV.M. \TODKKA (iray. ]S:','J. (Gr., "wave ; neck.") 



Eyes moderately euiargiiiate in front : maxillary palpi cylindri- 

 cal; last joint of labial palpi strongly dilated, hatchet-shaped; tarsi 

 elongate, distinctly 5-jointed : antenna' more or less serrate. Fifty 

 species are known from X ;rth America, three of which have been 

 taken in Indiana, while another mav occur. 



