•nil': sii(>iri'-\\i\i;i'ii sc \\i:\<!i'i; i!i':i'/n,i:s. 409 



IHrisidii I'j. 



Ill lliis dixisidii the piiiictmvs cf r\\\\-A ;ifc ;ill si'| i;i fill c ;iiiil 

 (lislitic! one I'lMiii ;iiio(lii'r. 'V\\r s|t.MM('s ;irc r;itlicr siiuill :iiiil, except, 

 the Jii-sl two. liii;lily pnlislied. 



KEY 'I'O SPKCIKS OK DIVISION E. 



(/. I'liliosceuce very coiirse niul disliiu-t. brownish-yellow on the iilitloiiicn ; 

 piiiKMures crowded, the iuterspjiees not polished. 

 h. Longitudinal ,i,n-o<ives lietweeu the eyes distinct; fonu slender. 



78t). STYCIICI s. 



Jih. Ldii.iritudinal jrnxives aliseiit. the surface between the eyes flat; form 

 more robust. '"">■ "'■■•^nis. 



ini. I'ubescence very tine and indistinct, very seldom yellow; punctures 

 rather sparse, their interspaces polished, 

 r. Transverse carinfe of abdomen with four cusps. 

 </. Thorax with an impression along some part of the median line. 

 c. Thorax elongate, slender; punctures separated by at least their 

 own diameters; length 3^ mm. vinnulis. 



cc. Thorax shorter, robust; punctures very close, never separated 

 by more than one-third their own width; third joint of an- 

 teunje much longer than fourth; length ::{.2-?..4 mm. 



CANAMCULATUS. 



(Ul. Thorax without an impression along the median line. 



/. First joint of iiind tarsi twice as long as second; length 3 mm. 



791. ARGl s. 



//. First joint scarcely one-half longer than second; antennal joints 



four and five equal in length, abruptly shorter than third; 



length 2.3 mm. mi no';. 



<-v. Transverse cariuse of abdomen without cusps; thorax not impressed. 



g. Very small, not over 2.2 mm. 



/;. Elytra nuich longer than wide, sparsely punctured, highly pol- 

 ished. '792. JUVENCUS. 

 hh. Elytra nearly quadrate, very densely imnctured. paupkrculus. 

 (jii. Larger, not less than 2.8 mm. ; antennal joints three to six decreas- 

 ing in length. 793. morio. 



789 (2383). Stents STYcacvs Say. Trans. Amer. Phil. Soc, IV, 18.34. 4.">s : 

 ibid. II, 574. 

 Rather slender. lilack, feebly shining; rather thickly clothed with long. 

 coarse, prostrate grayish-yellow hairs; legs and antenme piceiuis, larsi 

 slightly paler. Head rather small, not twice as wide as long; sui-face be- 

 tween the eyes nearly flat, densely and coarsely punctate. Antennae slightly 

 longer than width of head, the third joint a little longer than fourth. 

 Thorax subcylindrical, widest in front of middle, (me-fourth longer than 

 wide; coarsely, closely and evenly iiunctured. Elytra at base slightly wider 

 than head, suture one-tifth longer than thorax, punctured like the latter. 

 .Vbdomen at base narrower than elytra, very feebly tapering to apex, finely 

 and sparsely punctate, the transverse cariiue with four cusps. Length ."'. 

 3.7 mm. 



