42 FAMILY IT. OAItAlilD/i;. 



Horn. — "Syno])sis of tlic Species of Cycliriis Iiilmbitiiig Boreal 



Ameriea." in Ti-ans. Amer. Ent. Soc., VII, 1879, 168-185. 

 ]lorn.—Vn\\\. Brook. Ent. Soe., I, 1879, 79-82. 



About 'M) species of Cychrus are known from tlie United States. 

 Of these l)\it five have so far been taken in Indiana, though two 

 others perha])s oecni". 



KEY TO INDI.\NA SPECIES OE CYCIUUS. 



(/. Smaller, nut over l.". luiii. ; front tarsi of male broadly dilated, those 

 of fenuile not dilated; m;i.\ill:c hidden liene.-ith the broad cheeks; 

 legs stout. 

 1). Hind angles of thor.ix very obtuse; length 11.'-14 nun. 



c. Thoracic punctures very lew. limited to the basal impressions; 

 elytral stri;e interrupted only at apex. lil. sxENOSTOMrs var. 

 cv. Thorax with numercus imnctiu'es between and in the basal inv- 

 pressions; elyt;-al stria' interrupted behind the middle. 



22. EEC0NTE[. 



hh. Iliud angles of thoi-ax rectantxnlar ; elytral stri;e interrupted on 

 sides and apex ; length 11-12 mm. canadensis. 



tut. Larger. tS-2S mm: front tarsi of male but narrowly dilated; nmxilhe 

 exposed ; legs slender. 

 il. Thorax nearly as wide as elytra, the sides nui<-h elevated, the hind 

 angles jtrohinged backward, 

 r. Smaller, length less than 20 mm. 2.3. elevatvs. 



cc. Larger, length more than 25 mm. 24. vnrolok. 



(/*/. Thor.ax much narrower than elytra, moder.alely rellexed. the hind 

 angles not prolonged backward. 

 /■. Form robust: margins of thorax i-ather wide, distinctly refiexed. 



vn)rrs. 

 /■/'. Form slender: margins of tlmr.ax very narrow, not retlexed. 



2.J. ANDREWSII VAK. 



21 (82). Cychrus stenostomus indian.i5 Leng, MS. 



Oval, slender. Black; elytra violaceous, their margins bluish. Thoi'ax 

 broader than long, sides (airved. strongly converging on basal half; hind 

 angles obtusely rounded: disk smooth, the l)asal impressions linear, deep, 

 with very few i)unctures. Elytral iiderv.als slightly interrupted at sides, 

 moi-e distinctly on apical fourth, but \vA lubercidate. r.ength 11 12 nnu. 



Mai-i(Mi. I'dscy. ('rawfoi'd jiikI .iciiiiiiios coiinl ics ; scarce, .\pril 

 1 SephMnltcr 20. Mr. ('has. \V. licnu. ol' New York City, who has 

 lecently made a sja'cial study of Ndrtli .\mei-icaii ('uchrits. states 

 that this is a distim-t variety of sh if)sli>iiii(s Web., which ditfers 

 from that species by the usually "to1;d al)sen( (> of the transver.se 

 basal impression of tlie th(»i"ax." lie has o-ivcn it thi' varietal nana' 

 indiancp. 



