200 CANTHARIS CINEREA. 



rides, is commonly used for this purpose, as, by the irritation it 

 excites, it keeps up the inflammation, and at length produces sup- 

 puration. Any foreign body retained on the inflamed part answers 

 the same purpose. What are named Orange Peas, the small 

 unripe fruit of the orange, polished, are usually employed, as by 

 their odour they cover the factor of the discharge. One of these 

 is retained on the blistered part by a slip of adhesive plaster, and 

 by the irritation it occasions, keeps up a constant discharge. A 

 seton, or cord introduced by a needle answers the same purpose. 

 When a puriform discharge is thus established in a part, considera- 

 ble effects arise from the morbid action which it continues, and 

 the evacuation it occasions. It is a practice often employed with 

 advantage in asthma, paralysis, and a number of chronic affections." 



Dose. — The dose of the powder may be from one to three grains, 

 and of the tincture from ten drops to one drachm. 



Off. Prep. — Tinctura Cantharidis, L. E. D. Emplastrum 

 Cantharidis Vesicat. L. E. D. Empl. Cantharidis Vesicat. Comp. 

 E. Ceratum Cantharidis, L. Ung. Cantharidis, L. Ung. infusi 

 Canth. Vesicat. E. Ung. Cantharidis, D. 



CANTHARIS CINEREA.— Cinereous Blister- Fly. 



Spec. Char. Black ; margin of the thorax and elytra 

 cinereous. 



Lytta marginata ; Fabr. Syst. Ent. p. 200. IHeloe cinereus ; Forst. Nov. Sp. Ins. 

 p. 62. Cantharisinarginatus; Oliv. Ent. iii. no. 46. 



Inhabits South America ; Fabricius speaks of it as a native of the 

 Cape of Good Hope. It is also said to be found, though far less 

 plentifully, in some parts of the east of Europe. 



