TKM5IO I. TROPinERIXI. IT) 



Tribe I. TROPIDERINI. 



Iii this tribe the thoracic ridge is (except in Eusjtliyrus} re- 

 mote from the base, more or less sinuous and 

 obliquely bent on the sides; antenna? inserted in 

 fove;e under the lateral edge of the beak, the edge 

 sometimes expanded to partially cover the cavities. 

 (Fig. 28). 



KEY TO EASTERN GENERA OF TROPIDERIXI. 



a. Sides of beak not dilated over the antennal cavities. 

 &. Eyes entire; antennae longer than body in male, 

 two-thirds as long, female; length 6 or more mm. 



Fig. 28. Platy- 



rhinus latirostr'is L ISCHNOCERUS. 



L. A British ^. Eyes emarginate; antenme less than half the length 



species of Tro- 



piderini: /, tar- oi body; length less than 3 mm. 



S (After f Wo S odT C ' Hind an S^s of thorax not directed outwards. 



(L Antennal club oval, solid, sensitive only at tip; 

 eyes feebly broadly emarginate. II. ORMISCUS. 



(Id. Antennal club 3-jointed; eyes more distinctly arcuate-emargi- 

 nate. III. TOXOTROPIS. 



ec. Hind angles of thorax directed outwards; transverse ridge of tho- 

 rax very near the base. IV. BUSPHYRUS. 

 rt. Sides of beak dilated over the antennal cavities. 



e. Antennal club narrow, not compressed; length 5 or more mm. 

 /. Thoracic ridge strongly angulated, the apex of the angle touching 

 base at middle; claws simple. V. GONOTROPIS. 



ff. Thoracic ridge straight at middle; base of thorax strongly bi-emar- 

 ginate; claws acutely toothed at middle. VI. EURYMYCTER. 



ee. Antennal club oval, compressed; length less than 5 mm. 

 g. Beak shorter than head; eyes oblique, slightly oval. 



VII. TROPIDERES. 



gg. Beak longer than head; eyes rounded; antennae of male as long as 

 body. VIII. ALLANDRUS. 



I. ISCHNOCERUS Selion., 1839. (Gr., "slender" + "horn.") 



Here belongs a rather large species having the beak slightly 

 longer than head, cat-mate above, dilated at tip; antennal cavities 

 large, bordered above by a small elevated line; eyes longitudinal, 

 elliptical, rather coarsely granulated; antenme very slender, 

 second joint twice as long as first, three-fifths as long as third; 

 <) 11 broader, flattened, forming a loose, oval club; second tarsal 

 joint emargiuate with prolonged angles; claws with a long, acute 

 median tooth. 



5 (9202). ISCHXOCERUS INFUSCATUS Fahr.. Schon., 1839,' 192. - - t ' 



"*/ ' : '\ 

 Oblong, subcylindrical. Brown or blackish with yellowish-brown aiftl.-,. 



pale gray pubescence intermixed, exhibiting no distinct patteni'; tibiae red- 



