Ill 



Another enemy of some interest, although probably of small impor- 

 tance, is the wasp Eimienes hollii Cress. On one occasion a nest of 

 this species was found by Mr. Bishopp on a cotton leaf at Ladonia, 

 Tex. The nests are constructed of mud and stored with caterpillars 

 as food for the young wasp grub, which matures inside the clay nest. 

 There can hardly be any reasonable doubt that the wasp building in 

 this situation made use of bollworms for storing its nest. 



Quite a number of spiders w^ere observed at various times destroying 

 the boUworm in its different stages. In three of these cases moths had 

 been captured, once at Victoria by a large specimen of Lycosa riparia 

 Hentz (PI. XYIII, fig. 2), and again at Paris, Tex., and also at Ladonia 

 b}'' a jumping spider {Attus fasciolatus Hentz). A specimen of the 

 same species of Lycosa^ which was kept in captivity during the sum- 

 mer, proved to be very fond of bollworm larvae and moths, devouring 

 several during the course of a day. 



A small striped Attid spider (Dendryphantes nuMUs Hentz) was not 

 infrequently seen nesting beneath the involucres of the cotton squares 

 at Paris, and on three different occasions they were observed with one- 

 eighth to one-fourth grown larvae which they had captured in these 

 situations. Another form {Attus cardi- 

 nalis Hentz) was seen at Calvert, Tex., 

 during August, 1903, with a half -grown 

 bollworm in its jaws. 



No Texas ants have been observed in 

 the act of capturing any large larvae or 

 moths, and it is probable that none of 

 them do so, except under very excep- 

 tional conditions. Several times larvae 

 which had most probably been previ- 

 ously injured were being devoured by 

 ants, and once a moth which had emerged 

 under a jar in the garden was found dead 

 soon afterward, literalh^ covered with 

 the little yellow "thief ant," Solenopsis texana Em. That t\\Qj were 

 the cause of its death is, however, exceedingly doubtful. 



Among the beetles there are two groups which probably destroy a 

 fair number of bollworms. Certain ground beetles, notably Calosoma 

 angulatumCh^Y.^ C. scrutator Fab. (fig. 17), C. calidum Fab. (fig. 18), 

 and Harpalus caligiyiosus Fab., all known to have a fondness for cater- 

 pillars, are not infrequent in cotton fields and are probably of some 

 22051— No. 50—05 8 



-Calosoma scrutator: beetle 

 (after Com stock). 



