386 PHYTOPHAGA. [Lougitarsus. 



provisional, and must not be depended upon apart from the detailed 

 descriptions; an hour or two's work, however, at an authentically named 

 collection of the British species will enable the student of the group to 

 determine his specimens with far greater ease than any mere descriptions 

 can do. 



I. Elytra dark, with or without obscure lighter mark- 

 ings at base and apex ; thorax dark, black or 



pitchy-reddish. 

 i. Elytra nnicolorous. 



1. Elytra rather coarsely punctured. 



A. Elytra entirely covering abdomen. 



a. Elytra very closely and irregularly punc- 

 tured, with the apex acuminate; size 



larger L. NIGER, Koch. 



b. Elytra substriately punctured at base, with 



the apex of each separately rounded . . . L. PULEX, Sckrank. 



(obliteratus, Bosh.) 



B. Elytra not entirely covering abdomen . . . L. AKCUUSJB, Paylc. 



2. Elytra very finely punctured L. ATBB, F. 



(jparvulus, Payk.) 



ii. Elytra with the apex and often a spot at shoulders 

 more or less obscurely reddish ; form rather long, 



oblong ovute L. ABSINTIUI, Kuts. 



iii. Elytra with the apex broadly and distinctly red- 

 dish-yellow ; form short, ovate L. HOLSATICUS, L. 



iv. Elytra with a rather distinct yellowish spot on 



each at apex, and another at shoulders . . . L. QUADRIGTTTTATTTS, Pont. 



(quadripustulatvs, F.) 



II. Elytra dark with broad yellow borders ; thorax 



cleur reddish-yellow L. DORSAIIS, F. 



III. Elytra castaneous or reddish-brown, with the apex 

 usually somewhat lighter. 



i. Elytra lighter or darker pitchy red or brownish- 

 red, set with long cilia at margins towards apex . L. CASTANETS, Duft. 

 ii. Elytra dark brown, fuscous, or pitchy, without 

 cilia at margins. 



A. Thorax longer ; punctuation finer L. BRUNNEUS, Duft. 



B. Thorax shorter ; punctuation coarser. 



a. Thorax more distinctly punctured ; average 



size larger L. LTTRIDUS, Scop. 



b. Thorax leas distinctly punctured ; average 



size smaller L. VUSCULUS, Kut. 



IV. Elytra testaceous or reddish-testaceous, with the 

 suture always, and the side margins occasionally, 

 darker, the colour of the suture being sometimes 



black and sometimes rufescent. 

 i. Form larger and broader ; punctuation of elytra 



diffuse . . . L. AGILIS, Eye. 



ii. Form smaller and narrower ; punctuation of elytra 

 much closer. 



1. Elytra with the shoulders obliquely rounded. 



A. Thorax pitchy black or black, very finely 



punctured, much narrower than elytra . . . L. SUTUBELLUS, Duft, 



(Juscicollit, var., Steph.) 



B. Thorax pitchy red or testaceous, distinctly 



