American journal of pharmacy . rcular spot of the same color; abdomen rather 548 Can titans I esicatoria. {^ 111. Juur. Iliiii ;«i. IMM. large and conical, entirely concealed by tlie elytra, which not onlyproject beyond the posterior portion, but also cover the sides, which ischaracteristic of the blistering beetles. 1 he blistering beetles arewell represented in this country, and it is to be regretted that theyhave not a place in the U. S. PharmacopcLia, as they are in no wiseinferior to the C. vesicatoria in vesicating properties. The mostcommon are C. vitatta, C. cineria, C. ni
American journal of pharmacy . rcular spot of the same color; abdomen rather 548 Can titans I esicatoria. {^ 111. Juur. Iliiii ;«i. IMM. large and conical, entirely concealed by tlie elytra, which not onlyproject beyond the posterior portion, but also cover the sides, which ischaracteristic of the blistering beetles. 1 he blistering beetles arewell represented in this country, and it is to be regretted that theyhave not a place in the U. S. PharmacopcLia, as they are in no wiseinferior to the C. vesicatoria in vesicating properties. The mostcommon are C. vitatta, C. cineria, C. niarginati, C. atrata, and The best known is C. vitatta {J^ig. j), commonly calledpotato fly. It is somewhat smaller than C. vesicatoria, being fromy^ to 3_^ inch in length and about j^^^v inch in breadth. It is of a blackcolor, with the exception of ochreous markings; the under portionof the body is cinereous; head cordate of a light ochre color, withtwo black spots on the apex; mandibles entirely concealed by the. Fig. 3.—Cantharis Vitatta. labrum ; labial palpi two-jointed, the last joint large and flattened;maxillary palpi three-jointed ; antennae black and filiform ; cl) peuslarge; eyes large and compound, extending over the lower side o{the head; prothorax elongated and much narrower than the head,of a black color, with a brownish yellow central and a taintlateral line; coxae of the first pair of legs much elongated; thearticulated portion of the femora are of an ochre color; the otherportions are cinereous; scutellum small; elytra are black, with amedian and marginal stripe of yellow; they slightly overlap thepleurites. The whole insect is covered with a fine pubescence. The vesicating properties of the blistering beetle3 reside in a crys-tallizable substance termed cantharidin, and according to some writers, ^.-elnruMS;} Cauthans I csicalona. 549 in a fjrecn fixed oil; but this is no doubt due to the presence of can-tharidin, which is soluble to some exten
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