428 BOARD OF AGRICULTURE. [Pub. Doc. 



of segment truncate ; caudal appendao-es long, blunt, spiny, 

 slightly depressed, and l)earing on the upper surface a 

 hump-like protuberance provided with a few spines. The 

 spiracles are nine in number, and are arranged the same as 

 in (7. frigiduin; the color, however, is black. Legs small 

 and spiny, tarsi bearing two claws. The anal proleg is 

 stout and covered with numerous short hairs. The under 

 surface is of a purer white than in (J. frigidwm, but bears 

 similar markings. The latter resemble those of the pre- 

 ceding species in form and arrangement, but are slightly 

 darker in color. The spots composing the first lateral row 

 are more elongated, and all the ventral spots are somewhat 

 larger than in the preceding species. The time spent in 

 this stage is about one month, of which about three weeks 

 are passed in feeding. When full grown the larva burrows 

 into the ground to a depth of several inches, and after pre- 

 paring a cavity throws oft' its skin and goes into the })upa 

 stage. 



Pupa. — (Plate 5, Fig. 2.) The pupa resembles that of 

 O . friyidum very closely, but is stouter and less compressed 

 at the anterior and posterior ends. Other difterences occur 

 in the shape of the j^rothorax, which is not nearly as 

 rounded in front as in O . frigiduin. The anterior margin 

 of the meso-thorax is transverse ; the lateral projections of 

 the dorsal abdominal segments are not as marked as in G. 

 frigidum. Anal stylets larger, more prominent. Brushes 

 of hairs present on the first five abdominal segments. The 

 figure shows a part pushed out from beneath the last ab- 

 dominal segment. All the pupte died before spring. 



Habits oftJie Larvoi. — The larvae of this genus of beetles 

 are called indiscriminately by the common names of '• cut- 

 worm lion," " corn grub killer," etc., although these names 

 have been referred more particularly to the larva of C. 

 calidum. The reason for such names is very apparent, 

 since the larva^ are often found in gardens, and do a great 

 amount of good in killing cut-worms and other injurious 

 caterpillars. They have also l)een reported as feeding on 

 the Colorado potato beetle larva {Doryj^hora deceinlineata). 



