42 FAMXLT n. — caeabid.t;. 



Horn. — "Synopsis of- the Species of Cyehrus Inhabiting Boreal 



America." in Trans. Amer. Bnt. Soe., VII, 1879, 168-185. 

 Horn.—RwW. Brook. Ent. 8oe.. I, 1879, 79-82. 



About 30 species of Cyehrus are known from the United States. 

 Of these but five have so far been talten in Indiana, though two 

 others perhaps occur. 



KEY TO I^"DL\.XA SPECIES OF CYCHRUS. 



a. Smaller, not over ].5 mm.; front tarsi of male broadly dilated, those 

 of female not dilated ; maxillae hidden beneath the broad cheeks: : 

 legs stout. 

 h. Hind an.gles of thorax very obtiise; length 12-14 mm. 



c. Thoracic punctures very few, limited to the basal impressions; 

 elytral striae interrupted only at apex. 21. stenostomus var. 

 cc. Thorax with numerous punctures between and in the basal im- 

 pressions; elytral strijp interrupted behind the middle. 



22. ij;coxTEi. 

 66. Hind angles of thorax rectangular ; elytral strife interrupted on 

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



an. Larger, 1N-2S mm: front tarsi of male but narrowly dilated; maxillfe 

 exposed ; legs slender. 

 d. Thorax nearly as wide as elytra, the sides much elevated, the hind 

 angles prolonged backward, 

 e. Smaller, lengtli less than 20 mm. 23. elevatus. 



cc. Larger, lengtli more than 25 mm. 24. uxicolor. 



i}(L Thorax much narrower than elytra, moderately reflexed. the hind 

 angles not prolonged backward. 

 /. Form robust ; margins of thorax rather wide, distinctly retlexed. 



viDurs. 

 if. Form slender ; margins of thorax very narrow, not reflexed. 



25. AXDREWSII VAK. 



21 (82). Cyciieus stenostomvs Indiana Leng, MS. 



Oval, slender. Black ; elytra ^ iolaceous, their margins bluish. Thorax 

 broader than long, sides curved, strongly converging on basal half ; hind 

 angles obtusely rounded; disk smooth, the basal impressions linear, deep, 

 with very few punctures. Elytral intervals slightly interrupted at sides. 

 m(ire distinctly on apical fourth,, but not tuberculate. Length 11-12 mm. 



ifarion, Posey, Crawford and Jeiniiiigs counties; scarce. April 

 4-Septemher 20. Islv. Chas. AY. Leng, of New York City, who has 

 ictently made a s])ecial study of North American Cijchrus, states 

 that this is a distinct variety of sleni)stoinK.'< Wcl).. which differs 

 from that species bv the usnall>- "total absence of the transvei-sc 

 basal impression of the tliorax." He has given il the varietal name 

 indiance. 



