EXPLANATION OF COLORED PLATE. 



Fig. 1, Egg enlarged about 25 times. Fig. 2, Maggot, much 

 enlarged. Fig. 3, Puparium enlarged about 3 times. Fig. 4, Adult 

 Fly, three times enlarged. Fig. 5, Young cabbage plant, showing 

 maggots on stem below ground, two puparia in soil a short distance 

 from plant, two flies egg-laying, one placing its eggs between the 

 stem and the soil, the other in a crevice about an inch from plant; 

 a fly natural size on leaf, and one egg in the axil of one of the leaves. 

 Fig. 6, a Red Mite, Trombidium scabrum, Say, which feeds upon the 

 eggs. Fig. 7, Pseudeucoela gillettei, Ashm., much enlarged, a parasite 

 of the Cabbage Maggot. Pig. 8, Pterostichus leucoblandus, Say, natural 

 size. Fig. 9, Amara impuncticollis. Say, natural size. Fig. 10, 

 Agonodervs pallipes. Fab., natural size. Fig. 11, Pterostichus coracinus, 

 Neum., natural size. These four beetles when brought in from the 

 field, immediately devoured cabbage maggots given them, and are 

 therefore placed by the writer among predaceous enemies of Phorbia. 

 Fig. 12, a parasite, Plectisoits, sp., about twice enlarged, reared from 

 puparium of Cabbage Maggot. 



