PAKASITES OF THE COTTON WORM. 



189 



worm, a specimen of which (in alcohol) was fairly black with the hordes of tiny em- 

 mets which clung to it. 



NOTE. I am indebted to Dr. Auguste Forel for valuable aid in the determination of 

 the above species. My own studies of ants having been heretofore chielly directed to 

 their habits and structure, I sent examples to Dr. Forel, and received an answer barely 

 in time for use in verifying and correcting proof-sheets. I cordially acknowledge his 

 friendly assistance. 



The specimens of Dorymyrmex insanus, sent Dr. Forel regards as D. pyramicus, Roger, 

 Berlin Ento. Zeit., 1883, p. 1860. Solenopsls xyloni he believes to be S.geminata, Fabr. 

 I have nevertheless allowed my name 



to stand provisionally, until further _ 1. 



examination, for the following reason, 

 among others. The specimens sent 

 me by Mr. Comstock were quite nu- 

 merous, and were all workers, major 

 and minor. Neither these nor speci- 

 mens from Texas in the American En- 

 tomological Society collection had ex- 

 amples of the large-headed soldier 

 caste, which belongs to S. geminata, 

 specimens of which I have from 

 Florida. 



ILLUSTRATIONS. 



Fig. 35 (a). Dorymyrmex insanus. 

 Dorsal view, enlarged. 



Fig. 35 (&). D. insanus. Side view, 

 enlarged. The natural length is indi- 

 cated by the line beneath the figure. 



Fig. 35 (c). D. insanus. View of 

 head. 



Fig. 36 (a). Crematogaster lineolata. 



Fig. 36 (6). Side view of same. 



Fig. 36 (c). Same; view of head. 



Fig. 36. (d). Same ; queen ; side view. 



Fig. 36 (e). Same; wing of queen. 



FIGS. 37 and 38. Solenopsis xyloni. 

 Enlarged. 



Fig. 36 (/). Same ; view of insect when excited, with abdomen turned np. 

 Fig. 37 (a). Solenopsis xyloni. Dorsal view, enlarged. 

 Fig. 37 (&). Same; side view. 

 Fig. 37 (c). Same ; view of head. 

 Fig. 38. Same of queen ; side view. 



PARASITES. 



The abundance of the true parasites of the cotton-worin, and the num- 

 ber in which they occur, renders their consideration of the highest prac- 

 tical importance. 



Taking into consideration the number and variety of these friends of 

 the planter, and the way in which they may make themselves obvious to 

 every one who tries to work out the life history of the cotton- worm, it 

 seems very strange that several recent writers should have entirely 

 overlooked their presence. Mr. Grote, in his paper before the Ameri- 

 can Association for the Advancement of Science, stated that he had 



