1911.1 275 



L. c^tJADRiauTTATtrs, Pontopp. [Nat. Dan. p. 203, 1765]. 

 Sjn.s. qundri/imstidatus, Fab. [Syst. Eiit. p. 114]. 



qnadrimaculatus, Kocli [E. H. 2, p. 128]. 



ci/nogWsi, Marsh. [Eut. Brit. p. 205]. 

 Ovate, much narrower in <? than in ? , shining, black, with (in type form) 

 two testaceous red spots on each elytron — one at shoulder — and one on margin 

 above the apex. There is a complete gradation from this fully spotted form to 

 iinicolorous black, some specimens having the Inimeral, some the apical, and 

 othei-s all four spots, almost or quite effaced. Autennje : stout and long, con- 

 siderably longer in S than in ? ; first fom- joints yellow, remainder black. 

 Thorax : transverse, very convex, distinctly bordered, varying to some extent, but 

 not so greatly as in the preceding species, in character of pvmctuation, wliich 

 is xisually rather fine and remote, the intervals always alutaceous. Elytra : 

 punctuation confused, fine and close, very different from that of L. holsatimis ; 

 apices slightly roiinded. Legs : testaceous, with last two joints of tarsi fuscous, 

 and posterior femora always black. Underside black. Winged. 



Food plant. — Cynoglossum. officinale. 



Rare in Britain, altliouL>-li abundant where it occurs. Apparently 

 confined to the south of England. (Haliday's record from " near 

 Belfast" appears to need confirmation). 



Vars. — Weise has given the names " hinotatus " and " immaculatus,'" 

 respectively, to the two- spotted and vmspotted form of this species, and 

 also mentions a variety which he calls vittatws, but this form has 

 not, so far, come under our observation in this country. 



L. DORSALis, F. [Syst. Eleuth. I. p. 465. 78] ; Oliv. [Enc. meth. IV. 



p. 109. 31] ; Steph. [Man. p. 298]. 



Oblong ovate, depressed. The most distinct and definite in colour of all 

 our species. Head black ; thorax reddish testaceous ; elytra black, with a 

 broad uniform testaceous marginal band from shoulder to apex. i\jitenna3 

 rather short, stout, entii-ely black. Thorax transverse, bordered at sides, 

 alutaceous, very finely and remotely piinctured. Elytra also distinctly aluta- 

 ceous, with punctuation confused, close and moderately strong ; apices rounded. 

 Legs usually entirely black, occasionally more or less pitchy or ferruginous. 

 Underside black. Winged. 



Food plants. — Senecio jacohxie and S. vulgarh (Fowler) ; *S'. eruci- 

 f alius (Foudras) ; S. erucifolius and ;S'. vulgaris (peut-etre aussi sur 

 r Erigeron ranadense) (Bedel). 



Not common, and confined apparently to the southern half of 

 England. 



This appears to be one of the very few species of LongitarsHs 

 in which no variation is known. 



(To be co7itinuecl) . 



