206 



ENTOMOLOGY FOR MEDICAL OFFICEES 



thoroughly fumigated with sulphur in the way recommended 

 for Dermestes, plenty of sulphur being left to burn itself 

 out after the room has been "hermetically sealed." The 

 following day the room may be opened and it and all its 

 contents well cleaned with some fluid that suits the case — 

 ^■^•. S per cent, solution of formalin, 3 per cent, solution 

 of crude petroleum in water, i in 1000 watery solution of 

 perchloride of mercury if there is no metal to spoil ; or 

 crude creasote, crude carbolic acid, turpentine, benzine, or 

 acetic acid may be used. The disinfectant should be applied 

 freely with a garden squirt so as to reach the depths of all 

 crevices. 



Cimex rotundatus, Signoret (Fig. 91), the bug of warm 

 countries, much resembles C. lectularius, but can be distin- 



FiG. 91. — Cimea: rotundatus, ventral view, male. 



guished by the more elongate and more narrowly oval 

 abdomen, and by the greater dorsal convexity of the 

 pronotum. The pronotum (Fig. 88) has much the same 

 outline, but its margins are not so thin. According to 

 Patton this species is the intermediary host of the piro- 

 plasma of kala-azir. 



Cimex macrocephalus, Fieber. From Burma, seems to 

 be identical with C. rotundatus. 



Cimex columbarius, Jenyns, is found in pigeon-houses but 

 will attack man. It differs from C. lectularius in being 

 smaller; in having the abdomen circular and merely sub- 

 acute at tip ; in having shorter antennae, with the segments 

 not quite so slender, and the difference in length between 

 the 3rd and 4th segments not so considerable; and in 



