(J. Supra-antennary ridge pi'oininent, angular behind, sometimes forming two 

 horns in front ; posterior femora dentate ; posterior troclianters large, 

 terminating in a sharp spine. 

 ? . Supra-antennary ridge feebly developed, unarmed ; posterior femora un- 

 armed ; posterior trochanters very small, simple. 

 a' . Head narrower in front ; supra-antennary ridge less distinct ; the 

 punctuation of the head and thorax finer ; scutellum nearly twice 

 as broad as long, rounded behind ; the punctuation of the elytra 

 fine, the pubescence longer, the hairs reaching from one puncture 



to the other surinamensix, L. 



h' . Head broader in front ; supra-antennary ridge more distinct ; the 

 punctuation of the head and thorax, especially that of the head, 

 evidently stronger ; scutellum at least three times as broad ns 

 long, scarcely rounded behind ; the punctuation of the elytra 

 more distinct, the pubescence shorter, the hairs not reaching from 

 one puncture to the other bicornis, Er. 



b. Temples moderately long, equalling one-third of the diameter of the eyes, tuber- 



culiform ; thoracic grooves unequal, the lateral twice as wide as the median. 

 ? ( (J unknown) aheillei, Guill. 



c. Temples very small, tuberculiform, equalling one-fifth of the diameter of the eyes ; 



thoracic grooves equal. 



<? . Head and posterior trochanters unarmed ; posterior femora dentate. 



? . Posterior femora unarmed ; posterior trochanters very small, simple... 



mevcator, Fauv.* 



S. surinamensis is by far the most abundant species ; it has on 

 more than one occasion been found " out of doors," under bark, in 

 England. 



S. bicornis is recorded from Marseilles, Toulon, Nice, Mentone, 

 Algeria, &c. I have it from Cephalonia {Walker). 



S. aheillei is described from a single specimen ( ? ) from Palestine. 



S. mercator (for specimens of which I am indebted to M. Fauvel) 

 is recorded from Toulon, Marseilles, Nice, Eouen, Lyons, New Cale- 

 donia, many localities in North America, &c. It has occurred at 

 Eouen in shipments of ground-nuts (Arachis), with Palorus suhdt- 

 pressus, Woll. ; and on one occasion was found under the bark of 

 planes, near corn granaries. 



The genus Palorus affords a parallel case to the present, several 

 nearly-allied cosmopolitan species belonging to it having long passed 

 under one specific name.f 



Horsell, Woking : October 3rd, 1896. 



* Rev. d'Ent., viii, p. 132, note (18S9). . j d i. 



t Since my remarks on this genus were written (antea, yv- 26-30) P. ^«<^«*"';?/,^""*^/; *"7 



depZssas have been recognised in North America, c/. Chittenden, Ent. News, vu, p. 138 (May. 1H96). 



