12f>4 FAMILY LV. TENEBKIONIMS. 



e. Head of male unarmed: scutelluin broadly transverse; eyes 



rounded, entire. XII. C.ENOCORSE. 



cc. Head of male armed with two pointed tubercles; scutelluin little 



wider than long; eyes transverse, divided. ({NATHOCERUS. 



<I<1. Last joint of maxillary palpi triangular; head of male not tubercu- 



late; length more than mm. 



/". Kpipleura 1 entire; front tibi:e more or less dilated, finely toothed; 

 last joint of antennm oval. XIII. ALPHITOBIUS. 



/'/. Epipleune abbreviated; color dark reddish-brown. 



//. Front tibia 1 slender ; first joint of hind tarsi short ; form elon- 

 gate, subdepressed. THARSUS. 

 (/!/. Front tibi;e broad, serrate; form broad, subconvex. 



XIV. ULOMA. 



cc. Base of thorax margined, the hind angles covering the humeral an- 

 gles of elytra; front tibia 1 slightly dilated, finely denticulate. 



EUTOCHIA. 



X. TRIBOLIUM McLeay. 1825. (Gr., "thrice pointed.") 



Small elongate parallel species having the antenna? slender, the 

 last three joints suddenly dilated to form a flattened club ; mentum 

 nearly square with rounded 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 IMHA.XA SPKCIES OF TKIBOI.ir.M . 



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

 tinctly three-jointed. (Fig. 501, /.) 2318. FERRUGINEUM. 

 (/-. Head expanded each side of front of eye; antennal joints gradually 

 broader to tip. (Fig. r.oi. < . ) 2319. CONFUSUM. 



*231S (7403). TRIHOLU-M FKHKIGIXKI-M Fab., Spec. Ins., I, 1781. 324. 



Elongate, slender, parallel. Ileddish-brown. 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 very narrow, fine raised lines, the stria 1 with rows of minute 

 pundures. Length 4 1.5 mm. (Fig. 501.) 



Southern half of State; common in meal, grain and other vege- 

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

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

 "flour weevils," and "live upon cereal and other seeds and various 

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

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

 flour in mills, and these and the larva' they product 1 , being minute 

 and pale in color, readily escape notice; but after the Hour 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 flour 



