173 



This is another common insect about which very little is known. 

 Its food plants and life history are worthy of study. I have taken 

 this species from Mar. 20 (adult, 1894) to Nov. 4 (adult, 1893) 'it 

 Bloomington, 111.; at Havana, 111., during August; and at Chicago 

 June 8 (1902). That it probably hibernates in the adult stage is 

 shown by the fact that I captured an adult as early as Mar. 22 at 

 Urbana, 111. This bug, like the squash-bug (Anasa), may have 

 an active migratory period in the fall, and only those individuals 

 survive the winter w4iich happen to be in favorable places w^hen the 

 cold weather sets in. I have captured this bug in the dense Brown- 

 field woods (Urbana), where it was crawling on a log Oct. 12 (No. 

 312, C.C.A.). Hart ('07, p. 237) records it from Asclepias cornuti 

 (--=A. syriaca) at Havana in the sand area, and also from Teheran, 

 Illinois. 



Oncopeltiis fasciatus Dall. Large Milkweed Bug. (PI. XLII, fig. 3.) 

 This large red plant-bug I took but once — on flowers of the 

 swamp milkweed, Asclepias incarnata (Sta. l,g), Aug. 8 (No. i); 

 T. L. Hankinson, however, captured another specimen (Sta. I) July 

 3 1911 (No. 7665). 



I have found it in years past abundant on prairie colonies of 

 milkweed at Bloomington, 111., from June into September, and at 

 Havana and Chicago during August. On Sept. 26, at Mayview, 111., 

 along the railway among prairie plants this plant-bug was found on 

 dogbane (Apocyniim). A pale yellow color may replace the red. 



CORElTfM 



Harmostcs rcflcxiilns Say. 



This bug w-as found in flowers of Asclepias syriaca along the 

 railway track (Sta. I) Aug. 12 (No. 27). 



Eeduviid.e 



Sinea diadcma Fabr. Rapacious Soldier-bug. (PI. XLI, fig. 4.) 



One specimen of this bug was taken from the flowers of the 

 mountain mint, Pycnanthenmm flexuosum, in the prairie grass col- 

 ony (Sta. l.g). Aug. 8 (No. 6). I took it at St. Joseph, 111., in a 

 colony of prairie vegetation along the railway track Sept. 26, 191 t 

 (No.495^C.C.A.). 



This bug preys upon caterpillars and many other insects. The 

 little we know of its life history has been recorded by Ashmead ('95, 

 Insect Life, Vol. 7, p. 321); its predaceous habits, however, have 

 attracted considerable attention from economic entomologists. For 



