1254 FAMILY LV. — TKNEBKlONlD.i:. 



e. riojul of innk' uiianiunl : sciilclliiiu limndly transverse; eyes 



rounded, entire. XII. C.enocorse. 



er. Head of male armed with two pointed tuliercles; seutelhim little 



wider than lon.i,'; eyes transA'erse, divided. (Jnathockkis. 



(/(/. I>asl joint of maxillary |)al|ii trlan.unlar; head of male not tuhercu- 



lale: len.iith more than (I nnn. 



/'. K]>iiilenra' entire; front tihia' inuw or less dilated, finely toothed; 



last joint of antenna' dV.al. XIII. Ai.i'iirroBius. 



//. Epii)lenra' ahl)reviated ; color dai'k reddish-hniwn. 



(/. Front til)i;e slender; first joint of hind tarsi short; form elon- 

 .uate. snhdepressed. Tharsus. 



.'///. Front tiliia' lii-oad. serrate: form itroad. snhconvex. 



XIV. rix)MA. 



re. Base of tlmrax margined, the hind ani^des eoverint:: the humeral an- 

 gles of elytra; front tihiu' sli,i,^htly dilated, finely dentieulate. 



EUTOL'HIA. 



X. Tribolium ]\leLeay. 1825. (Gr., "thriee pointed.. ") 



Small elongate parallel species having the antenna^ slender, the 

 last three joints snddenlv dilated to form a flattened clttb ; mentum 

 nearly square with rotinded front angles; last joint of maxillary 

 palpi elongate-oval, truncate at apex. Two of the three listed, spe- 

 cies occur in the State. 



KEY TO INniANA SPKCIES OF TKHiOI.rUM . 



a. Head not expanded heyond the eyes at the sides; auteuual club dis- 

 tinctly three-jointed. (Fig. 501, /.) 2.31S. ferrugineum. 

 (/(/. Head expanded e;ich side of front of eye; antennal joints gradually 

 broader to tip. (Fig. .">(;i. c) L'319. confusum. 



*2:>1S (74(;:'>). Tkikolum fkkriginei m Fab.. Spec. Ins., I. 1781. 324. 



Elongate, slender, pai-allel. Iteddish-hi-own. shining. Thorax one-half 

 wider than long, sides feebly curved, hind angles rectangular; surface finely 

 and rather sparsely and deeply punctate. Elytra with the intervals repre- 

 sented by vei-y narrow, fine raised lines, the stria^ with rows of minute 

 imnctures. Length 4-4.5 mm. (Fig. 5(11.) 



Soutliern half of State; common in menl, grain and other vege- 

 table products. Ililiernates. February 2-November 22. Both this 

 and the next species are commonly known as "flour beetles" or 

 "flour weevils," and "live u])on cereal and other seeds and various 

 other stored products, Imt generally prefer flour and meal and the 

 so-called 'breakfast foods.' Their cgL'S are often deposited in the 

 flour in mills, and these and the larva' they produce, being mintite 

 and pale in color, i'(^a.dil\- esca])e notice; but after the flour has been 

 barreled or placed in bags and left unopened for any length of time 

 the adult beetles make their appearance, and in due course the flotir 



