Natural Enemies. 



125 



longing to the genus Harpalus, is more particularly com- 

 mon, and busy in the good work. It is an active creature, 

 something over half an inch long, with powerful jaws and 

 a light-brown head and prothorax, and the rest of the body 

 pale, tapering posteriorly, 

 and ending in a stout 

 proleg and two articulate 

 appendages. For the en- 

 tomological reader I ap- 

 pend a more detailed de- 

 scription : 



Color yellowish white; pro- 

 thorax and head highly pol- 

 ished yellowish-brown, the 1 

 jaws darker. Head broad, 

 depressed and rugose in front; 

 jaws broad, robust, dark, and 

 with but one strong middle 

 tooth ; antennae 5 jointed, 

 joints 4 and 5 scarcely equaling 

 3 in length ; maxillae elongate, 

 sub-cylindrical, with a 4-joint- 

 ed outer and a 2-jointed in- 

 ner palpus ; mentum elongate, 

 its base soldered with the 

 lower head; labrumalso elongate and with 2-j minted palpi; all trophi 

 armed with stiff hair. Prothoracic joint, swollen, wider than head, 

 twice as long as succeeding joint, horny, and with a darker anterior 

 border, limited by a transverse stria posteriorly and marked with fine 

 longitudinal striae. Legs, except coxae, dark brown and thickly 

 beset with short, spinous bristles of the same color. Abdomen 

 tapering to end, with no horny plates, but each joint with two 

 transverse rows of stiff yellowish hairs, the posterior rows strongest. 

 Anal proleg stout, the cerci 4 jointed (joints 3 and 4 small and im- 

 perfectly separated) and reaching but little beyond it ; eyes small, 

 dark, and just behind base of antennae. Length of largest speci- 

 mens 0.58 inch. 



Eight specimens feeding on eggs of Caloptenus spretus. 



Habpaltts? Larva that peeys ojt Lo- 

 cust Eggs -—a. larva from above , &. head, 

 from beneath c, .eg— enlarged. 



