Anthiciis.] HLTEROMERA. 85 



may at once be known from Notoxus by not having the thorax prodnced 

 into a horn over the head, and by the shorter last joint of the antennae; 

 some of the unicolorous black species are rather difficult to distinguish; 

 the genus is by certain authors divided up into several sub-genera. 



I. Anterior .tibiae not produced into a spine at apex 

 externally ; tibial spurs small or indistinct (Jin- 



thicus, i. sp.). 

 i. Head rounded at base. 



1. Front of thorax narrower, scarcely as broad as 



head ; sides less strongly narrowed behind . . A. HTTMILT8, Germ. 



2. Front of thorax broader, at least as broad as, 

 or broader than, head ; sides more strongly and 



suddenly narrowed behind A. SALHTUS, Crotch. 



ii. Head straight or almost straight at base. 



1. Elytra reddish-brown or light brown at base, 



darker towards apex. 



A. Male with the -posterior tibiae not dilated ; 



elytra rather flat, obsoletely impressed at base A. FLORALIS, L. 



(v. quisquilius, Thorns.) 



B. Male with the posterior tibiae very strongly 

 and spathulately dilated externally at apex ; 



elytra convex, not impressed at base .... A. iNSTABitis, Schmidt. 



2. Elytra black or brownish-black, nnicolorons or 

 with at most an obscurely lighter patch at 



shoulders. 



A. Form narrower ; thorax evidently longer than 



broad. 



a. Thorax shorter and broader ; eyes larger ; 



femora red A. ANSUSTATTTS, Curt. 



b. Thorax longer and narrower; eyes smaller; 



femora black A. THISTIS, Schmidt. 



(v. Schaumi, Well.) 



B. Form broad and convex ; thorax scarcely 



longer than broad A. SCOilcus, Rye. 



3. Elytra black, with distinct and well-defined red 



markings A. AXTHEBnrirs, L. 



II. Anterior tibia? produced into a strong spine at apex 

 externally ; all the tibial spurs rather large and quite 

 distinct; size large; colour testaceous, with a small 



daik spot on each elytron (s.g. Eonius, Thorns.) . . A. BTMACULATTJS, HZ. 



A. humilis, Germ, (nigrinu-?, Zett.). Elongate, variable in colour, 

 the upper surface being entirely black or black-brown, unicolorous, or 

 with part of the thorax and one or two bands or patches on each elytron 

 ferruginous red or reddish-testaceous ; pubescence greyish, scanty but 

 comparatively coarse ; headoval, moderately large, rounded at base, 

 rather strongly punctured; antennae long, reddish ; thorax subcordiform, 

 considerably longer than broad, but scarcely as broad as head, dilated 

 in front and narrowed behind, distinctly punctured, with two well- 

 marked tubercles at base ; scutellum triangular, very small ; elytra oval, 

 or elliptical, about three times as broad at base as base of thorax, with 

 close and deep punctuation ; legs testaceous, femora and more or less of 

 tibia? dark. L. 2-3 mm. 



