THE OVLINDRICAL BARK BEETLES. 351 



cc. Head wilb distinct grooves. II. I':r('ifOM..s. 



hb. AiifoimiE ]l-joiiited, club 2-joiiited. 



d. Head without autenual grooves. III. Uitoma. 



dd. Head witti distinct anteunal grooves; tibite with terminal spurs. 



EUDESMA. 



aa. Front coxal cavities closed behind. 



d. Antennii' with ii two-jointod club; 1ilii;e without spurs. 



IV. ('(i\i:r.i s, 

 cf. Antcnn:e with a :!-.jiiiuted club; tibire witii small s]iurs. 



TjASCcxoi rs. 



I. Syxciiita IIpUw. 1702. (Or., "togethnr + skin or cover. ") 



Antenna' lO-jointed, terminating in an abrnptly larger club 

 joint, which is smooth at base and pubescent at tip ; first three 

 .ioints of tar.^i very short, together but little longer than half the 

 fourth. Of the .seven icnown species, two have been taken in Indi- 

 ana, while two others .should occur. 



KEY TO 1XDI.\N.\ SPECIES OF SYNCHITA. 



(I. Elytra witli tine cnst.-i': thora.x; with an elevated line each side. 



. LATICOLETS. 



aa. Elytra not costate. 



ft. Elytra variegated with paler markings. lO.'i:!. parviia. 



6 b. Elytra unicolor(.us. 



c. Thorax with a tine subapical impressed line, its disk finely granu- 

 late; length 2.5 mm. fuliginosa. 

 cc. Thorax without impressed line, its disk coarsely granulate; length 

 4 mm. 1054. geanulata. 



(S'. laticolH.? I ec, piceous. elytra with humeri and a spot near 

 apex reddish, length 2 mm., is a southern form which has been 

 recorded from Cincinnati. 



1053 (3247). Syxciiita pabvula Guar., Icon. Regn. Ins., 1830, ISO. 

 Oblong, subdeprcsseil. I'iceous brown ; elytra variegated with paler 



crossbars. Thorax wider than long, sides feebly curved, margin finely ser- 

 rulate, base slightly wider than apex, surface granulate. Elytra with rows 

 of rather small, close-set punctures; intervals granulate. Length 2-2. ."> mm. 



ilarion County; rare. December S. Taken from dry fungi on 

 a dead beech tree. 



.s'. fuliginosa Melsh., rusty red-brown, antenna, under surface 

 and leors paler, is also knowTi from near Cincinnati. 



1054 (3249). .SvxririTA gka^jueata Say, Journ. Phil. Acad. Nat. Sci., A'. 



1826, 266 ; ibid. II, 320. 

 Oblong, parallel, moderately convex, t'niform dull reddish-brown, sub- 

 opaque. Third joint of antennae as -long as the three following together. 

 Thorax wider than long, sides feebly curved, margin distinctly serrate, base 



