Nerve-winged Insects; Scorpion-flies; Caddis-flies 239 



and snatched at the second. Then holding both, it began to suck the blood 

 of the fresher prey. 



Bringing some scorpion-flies into the laboratory, Miss Patterson placed 

 a crane-fly in the jar with a pair of them. The male scorpion-fly seemed 

 unusually hungry and soon caught its prey and began to eat. The female 

 paid no attention until the male had eaten for some time. Then Miss Pat- 

 terson observed the male to bend the posterior portion of its abdomen, and 

 between the sixth and seventh and seventh and eighth segments on the 

 norsal side of the body rounded organs were quickly protruded and with- 

 drawn. Shortly after this the female approached and also began to eat 

 the crane-fly. Several times she noted the males attracting the females by 

 protruding the "scent-glands." In every case, when the male began to give 

 off the scent, the female gradually approached. 



Eggs were laid by the females in the laboratory jars. These eggs were 

 pink in color and spherical, although slightly flattened at opposite sides. 

 They are simply dropped by the female loosely and singly to the ground. 



IN THE Rocky Mountains of northern Colorado are some of the most 

 attractive " camping-out " places in our land; that is, for "campers" who 

 specially like Nature in her larger, more impressive phases. The peaks 

 of the Front Range rise to 14,000 feet altitude, and the ice- and water-worn 

 canons and great sheer cliffs of the flanks of the Range are only equalled 





FIG. 329. Phryganea cinerea. (After Needham; enlarged.) 



in this country by the similar ones of the Californian Sierra Nevada. The 

 mountain-climber in these wild regions cannot but interest himself in the 

 animal and plant life which he finds struggling bravely for foothold in even 

 the roughest and most exposed places. To the entomologist the few 

 hardy butterfly kinds of the mountain-top, the scarce inhabitants of the 



