NORTB OF MEXICO. 365 



TKII'.Ol.H'M. 1/ 



Tribolium, MacLeay, Anmilos. Javan., p. 47. 



The mentum in this genus is very nearly square, with rounded anterior angles. The 

 last joint oi the maxillary palpi elongate oval, truncate at apex. Antenna' slender, last 

 three joints suddenlj dilated, forming a flattened club, truncate al apex. The epipleurae 

 are entire but ex tremel) narrow al tip. Anterior tibiae very feebly dilated and percepti- 

 bly broader than those of the middle pair. 

 1 wo species are known in our lamia. 



T. feriugi neum, Fab., I Wollaston Tribolium). 



T. madens, < harp., Tenebrio : Redtenbacher Tribolium . 



The former species is ferruginous, the latter black. Length .16-.20 inch. The latter 

 species is the larger. A.s these two species are imported and full descriptions and details 

 of synonymy are given in many readilj accessible works on European Coleoptera, it is 

 deemed unnecessarj to repeat them. 



Both species are found abundantly wherever meal or grain is stored. 



DICEDUS, Lee. 

 Dioedus, Class. Col. N. A.. 238. New Species, p. 132. 



Mi ntum trapezoidal, narrower behind, anterior angles distinct, convex along the me- 

 dian line and coarsely punctured. Last joint of maxillary palpi elongate oval, scarcelj 

 compressed. Antenna' with the first joint cylindrical, thick, last two joints suddenly 

 broader, compressed and pilose, the last joint being the larger. Epipleurae entire, as broad 

 at apex as at middle, [ntercoxal process of abdomen moderate, rounded at tip. Anterior 

 tibiae slightly dilated, outer apical angle distinct, external edge with a few small teeth, 

 spurs rather large. 



1). ]i ii n <• I ;i t u s. Lee, loc. ril. 



\ small, elongate oval, black species, with the head and thorax and elytra! striae 

 coarsely punctured. The elytra have eight striae but no scutellar stria. In the specimens 

 in my possession the suture defining the epistoma is quite distinct, the line being darker 

 and smoother than the rest of the front. The epistoma is narrow, short and semilunar 



Length .10-.15 inch. Found rather abundantly under pine bark, over our whole 

 country. 



UNATHOCERFS, Thunb. 

 Qnathocerus, Thunbi rg . \ ■■'. Holm. ls| t. p, it. 



Mentum small, trapezoidal. Maxillarj palpi elongate oval, very obliquelj truncal 

 tip. Epipleurae short. Baseofthorax rather distant from base ol elytra. Hi id with 



IMKBI. run —vm.. xiv. 



