22o MEMOIRS ON THE COLEOPTERA 



minute pubiferous punctulation marginally and sometimes through- 

 out the elytra, the latter with the usual single discal puncture and 

 without scutellar stria; body much smaller in size, inflated posteriorly 

 and with rather thin integuments. Nearctic and Palaearctic regions. 



Trichocellus 



4 Elytra without continuous striae, except the sutural, and without the 

 usual discal puncture; anterior tarsi (cf ) feebly dilated and indis- 

 tinctly squamulose beneath, the middle tarsi slender and unmodified; 

 integuments thick. Pacific regions Glycerius 



Elytra each with nine uninterrupted and equal striae 5 



5 Anterior and middle tarsi (cf) rather strongly and subequally dilated, 

 the soles densely and uniformly clothed with subequal squamules 

 nearly as in the Anisodactylini; second and third labio-palpal joints 

 subequal, rather elongate; pronotum feebly beaded at base. Sonoran 

 and Mexican faunas Pelmatellus 



Anterior and middle tarsi (cf) dilated though unequally, both distinctly 

 biserially squamose beneath as in Harpalini; labial palpi still longer, 

 with the second and third joints subequal; frontal foveae not much 

 prolonged; pronotum strongly beaded at base. Atlantic regions of 

 North America Episcopellus 



Anterior and middle tarsi (cf ) dilated and strongly, biseriately squamose 

 beneath as in Episcopellus; labial palpi with the second joint much 

 shorter than the third; frontal foveae small, punctiform as in Harpal- 

 us, not obliquely prolonged; pronotum finely beaded at base, the 

 bead subentire; hind tarsi long and slender. South Africa. 



*Bradycidus 



Anterior tarsi (cf ) feebly dilated 01 swollen, feebly, biseriately squamu- 

 lose beneath, the middle tarsi slender and scarcely at all dilated 

 though feebly biseriately squamulose as a rule 6 



6 Antenna? with three basal joints glabrous, though sparsely setulose. . 7 



Antennae with two or three glabrous joints; body much more slender in 

 form and of smaller size, the scutellar stria wholly wanting as a rule . 9 



7 Frontal foveae isolated, not obliquely prolonged toward the eyes. 

 Northwestern North America Tachycellus 



Frontal foveaa linear and oblique as usual in the tribe and virtually 

 attaining the eyes; pronotum not basally beaded, except at the sides. 8 



8 Hind tarsi long. Nearctic regions Triliarthrus 



Hind tarsi short though slender. Palaearctic regions *Bradycellus 



9 Pronotum not foveate or punctate basally and without trace of the 

 usual basal fovea of the elytra and, consequently, never with a scutel- 

 lar stria; antennae rather stout, with only two glabrous joints. 

 Atlantic regions Catharellus 



Pronotum more or less foveate and punctate at base, the basal fovea of 

 the elytra near the scutellum always distinct 10 



10 Eyes well developed as usual, the mandibles short; antennae with 

 three glabrous or subglabrous joints, the third however with numer- 

 ous setae 1 1 



Eyes small, the mandibles long and very prominent 12 



II Second labio-palpal joint short, broad, flattened and subtriangular, 



