THE CYLINDRICAL BARK BEETLES. 551 



re. Head with distinct grooves. II. Errico.M.s. 



>>!>. Antenna 1 11-jointed, Hub 2-jointed. 



(I. Head without anteniial grooves. III. IMTOMA. 



(/(/. Head with distinct antenna] grooves; tibiae with tenuiiial spurs. 



EUDESMA. 

 aa. Front coxal cavities closed behind. 



(1. Antenna 1 willi a two-jointed ehil); tibia 1 without spurs. 



IV. (V)XKI.fS. 



ee. Antenna' with a 3-jointed Hub; tibia 1 with small spurs. 



LASCONOTUS. 



I. SYNCIIITA Hellw. 17!> (Gr., "together + skin or cover. ") 



Antenna 1 10-jointed. terminating in an abruptly larger club 

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

 joints of tarsi very short, together but little longer than half the 

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

 ana, while two others should occur. 



KEY TO INDIANA SPECIES OF SYNCIIFTA. 



(i. Elytra with tine <-nsta>: thorax with an elevated line each side. 



LATICOLIJS. 



mi. Elytra not eostate. 



li. Elytra variegated with paler markings. 1 ()":;. I'AKVI'IA. 



1>I>. Elytra unicolorous. 



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

 late; length 2.r> nun. FILIGINOSA. 

 i-c. Thorax without impressed line, its disk coarsely granulate; length 



4 111111. 1054. GRANULATA. 



X. liiicaV.i; I ec., piceous, elytra with humeri and a spot near 

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

 recorded from Cincinnati. 



1053 (3247). SYNCHITA PAKVULA Guer., Icon. Regn. Ins., 1830, IS!). 

 Oblong, subdepressed. 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 2-2.5 mm. 



Marion County ; rare. December 8. Taken from dry fungi on 

 a dead beech tree. 



*Sf. fuliginosa Melsh.. rusty red-brown, antenna: 1 , under surface 

 and legs paler, is also known from near Cincinnati. 



1054 (3249). SYS CHITA GUANULATA Say, Journ. Phil. Acad. Nat. Sci., V, 



1826, 266; ibid. II, 320. 



Oblong, parallel, moderately convex. Uniform dull reddish-brown, sub- 

 opaque. Third joint of antenna? as long as the three following together. 

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



