280 



APPENDIX I. 



closed thumb and first two fingers, enlarge the vent 

 slightly at the lower edge by a vertical cut with the 

 scissors ; next lay the larva either upon bibulous paper 

 on the table, or upon soft cotton cloth held in the left 



FIG. 194. Oven and lamp for preparing caterpillars by inflation. 



hand, and press the extremity of the body with one 

 finger, always with the interposition of cloth or paper, 

 so as to force out some of the contents of the body ; 

 this process is continued from points successively far- 

 ^ ier back, a slight additional portion 

 of the contents of the body being 

 gently pressed out with each new 

 g movement. Throughout all this pro- 

 x 19. cess reat care should be taken lest the 



skin should be abraded by too violent pressure, and 

 lest any of the contents of the body soil its ex- 

 terior or become entangled in the hairs or spines ; 

 to avoid the latber, the caterpillar should be frequently 



