TIGER-BEETLES VS. COTTON-WORMS. 



175 



nearly always predaceous. The generalization is made by Packard that 

 they are " generally oblong, broad, with the terminal ring armed with 

 two horny hooks or longer filaments, and with a single false leg be- 

 neath." Of these beetles all which are to 

 be found in the cotton fields will undoubt- 

 edly lose no chance 

 to destroy the cot- 

 ton-worms. A cor- 

 respondent from 

 Texas speaks of- 

 "the large green 

 ground-beetle" as 

 destroying the 

 worms. These are, 

 in all probability, 

 FIG. 22. Calosoma scrutator. Calosoma scrutator FlGl 23. Calosoma callidum. 



Fabr., shown at Fig. 22. According to Harris, this insect is known to 

 ascend trees in search of canker-worms and similar insects. Another 

 beetle of similar habits is Calosoma callidum, shown 

 at Fig. 23. Mr. Glover in the 1855 report figures a 

 species of Harpalus, probably H. caliginosus Say, see 

 Fig. 24, and in the* text refers to it as being abundant 

 in the cotton fields and beneficial by destroying the 

 different enemies of the cotton plant. 



SOLDIER-BEETLES (Coleopt, fam. 

 LampyridcB) genus Cliauliognatlms 

 Hentz). The family Lampyridce is 

 popularly known as the fire-fly family, 

 and the adult beetles are too well 

 known to need description. In the 

 perfect state they are nearly all veg- 

 etable feeders, while the larvae are 

 are nearly all carnivorous. The larvae 

 FIG. 24. Harpa- of Chauliognatlius are long, slender, FIG. 24^. Larva of 



Ins caiigimosus. fl attened? tapering toward the ends, Harpalus. 

 active, with large jaws. They are usually blackish, with pale spots.at the 

 angles of the segments. Chauliognatlius Pennsylvanicus (Fig. 25) was 

 found by Mr. Glover to be so plen- 

 tiful in the cotton-fields near Co- 

 lumbia, S. C., that four to six might 

 be taken from one bloom alone. 

 They seem to feed entirely upon the 

 pollen or nectar of the flower, and 

 would so busily engage themselves 

 in feeding as scarcely to notice the FlG> 25.-Chaulio g nathus Pennsylvania, 

 approach of mankind. When issuing from the flower they would nearly 

 always be so covered with masses of pollen as scarcely to be recognizable. 



