196 MANUAL OF VEGETABLE-GARDEN INSECTS 



the prothorax and the wings are dark brown except the edge, 

 which is narrowly bordered with yellowish. The antennse 

 are black, broadly ringed with yellowish white. 



The life history is similar to that of the tarnished plant-bug 

 and the eggs are deposited in similar places. The egg is also 

 similar but bears a small spine at the edge of the cap (Fig. 124). 

 The insect passes through five nymphal stages. The nymphs 

 are gayly colored with green, red and various shades of brown 

 (Fig. 125) and are found abundantly throughout the growing 

 season. 



Reference 



Cornell Agr. Exp. Sta. Bull. 346. 1914. 



The Xegro-Bug 



Thyrcocoris pulicarius Germar 



A serious outbreak of this small* black stink-bug occurred in 

 the celery fields of Michigan in 1893, causing a loss of many 

 thousand dollars. A similar outbreak took place in northern 



Ohio in 1906. It is surprising that 

 attacks of this kind have not been 

 more frequent, since the bugs are 

 often abundant on their wild food 

 plants over large areas every year. 

 The insect ranges throughout the 

 United States and Canada east of 

 the Rocky Mountains southward to 

 Florida and Arizona. The adult 

 (Fig. 126) is about yV ii^ch in length, 

 shining black, strongly convex, short 

 and broad, widest on the thorax 

 The scutellum is greatly developed 

 and covers the abdomen; the exposed edge of the wing 

 is yellowish white. 

 The insect hibernates in the adult condition and the bugs 



Fig. 126. — The negro-bug, 

 adult (X 14). 



and rounded behind. 



