H2 



Tm)^ r.. TASEV, 



long, or so Mliiiuniiiilly sliiipccl as to have no parallel, wiili wliicli I am 

 lily ol' ('oli'()])t('ra * Tlic (^ytra tlimiiili usually cov- 



faiiiil 



lar. HI tic 



raiiiil 

 iImI 



orin;;' the ciitin; alMloiiU'ii. in sonu; spccii's Icaw a lariic jiortioii cxjioscd. 

 Tho sfutolliun may he traiisvoivo, si-uji-ciiviilar, or triaiiiiiilar. Kriclisoii 

 first proposiMi tliis iallcr jKH-iiliarity as a basis of classilicatioii. taken irj 

 connei'tion witli the cinarirination of tlic cpistoina. and in my search tor 

 I'haraeters which should he 'inmistakahle, I was led to try this method. 



it I 



x'cami^ iniine(ii- 



At'ter tiunrini;' the scntelhim of each of our species, 

 atelv app:irent that they would not serve the purpose, because although 

 i/riis the seuteilum is acutely triangular with the sides almost per- 



il) // 



I'ectlv straight, we find otlier species m wliich it possesses all degrees ot 

 transvei-sality down to those in which it is very thin and transverse, and 

 it would be very difiicult in ])nictice to draw the line between any divi- 

 sions based on the structure of this j)art. 



The antennae offer characters which are easily recognizable, and ap- 

 pear to be very constant, and which have Iwen assumed as the basis of 

 the following table of species. 



T have in the I'ollnwing synopsis of the genus possibly made mistakes, 

 and this possiliility becomes stronger in those species which are European, 

 and for the ideiititication of wliich I had to rely solely on the descri]itioiis 

 of the various authors. I would, however, siy in this comurtioii that 

 the desi-riptions and figures given in the excellent work of vSturni,. 

 " Deiitschliinds Fauna. ' are almost eipiivaleut to a study of the insects 

 thenis(>lves. 



Tiu' foll<»wing is tlie cla.ssitication whicti is adopted fur our speci(^s : 



A.— Fii-sl J'liiit nf luil I'll line of luiiMuil I'orm; si>i'iiiicl Juint slinrtor iliim llio lliiril. 

 Liilinuii emiirgiiiiite. 



Last Ml n't" joints of nnteiiuiie % lliitteiu^l * 



Joint:* of anIciiiKic % sul,i-»^piul. 



Last j(vini % l)ont 1. tcrillini»lis» 



Liist joint striiiQ;lii 2. biKiittiltiiPi^ 



Last tliri-*' joints of iiiiteiinMi' % to..,'t>ilii>i' nearly ('(|iial to o?u>-tiiirii of tlicir 

 entire lenECtli. 



l''roj(,><'ting t(M-tii of opist.iinii luiicli ronmled aiitiM'iorly :>. rnM4;iuliiN> 



Projocting tec'tli of qiistoniii vi'iy acute. 1. lieCoiltei. 



« Liilinini entire; transverse groove of Iu-.k! wanting :>. nori<laillI!4. 



Laliriiin entire: aiiteiiuae irregular. 

 Body <lepre8se(l. 



Elytra entire fi. cliaini«ropiN> 



Elytra shorter ttuiii the alxloinen 7. lllodestUN. 



Body convex. 



Anterior angles of protliora.x toothed S. COIlvexilllIS. 



Anterior angles roundoib never tootlied <). adiiNtilH. 



* Separated as Dysnienis. 



