HOW TO KNOW THE INSECS 



Fig. 148. Galgupha atra A. and S. 



Very convex. Black, shining; antennae 

 reddish brovm. Our largest Negro bug. Length 

 5-6 mm. 



The Negro bugs are black and very convex. 

 Beginners often mistake them for beetles. The 

 Ground or Burrower Bugs are more flattened and 

 resemble the Stink bugs In form. Some are 

 black and others deep chestnut brovm. 



Figure 148. 



4a Sma 1 1 insects. 

 Fig. 149. 



Front wings resembling lace. (Lace Bugs.) 



Fami ly 9, TINGITIDAE 



Fig. 149. Corythuca cllllata (Say) The 

 Sycamore Lace-bug. 



Body black; antennae and legs yellowish. 

 Upper surface milk white except a fuscous 

 middle spot. Hood depressed just behind 

 middle, on head. Common on leaves of syca- 

 more, v'hlch It discolors and causes to fall 

 prematurely. Length about 4 mm. (From 

 U.S.D.A.) 



The Lace-bugs surely live up to their 

 name for they are daintily dressed v/lth 

 wings that look as though they had been 

 made by some expert lace knitter. l,:any are 

 oval In outline while some are elongate. 

 Figure 149. Nymphs and adults are found together, feed- 

 ing on the underside of leaves of many 

 plants. Like many other plant feeders a 

 species usually sticks pretty closely to one food plant. 



4b Not as In 4a 5 



5a Antennae with five segments; mostly flattened, shield shaped 

 bugs. (The Stink Bugs.) Fig. 150 Family 3, PENTATOMIDAE 



Fig. 150. Ivlurgantla hlstrlonlca 

 (Hahn) The Harlequin Cabbage Bug 

 Black; head marked with yellow; 

 thorax, scutellum, and elytra marked 

 with orange red. The pattern is 

 rather uniform in arrangem.ent but 

 varies considerably In different 

 species as to size of red marks. A 

 pest of cabbage and related plants, 

 now coming into lov/a. Length 9-12 mm . 



The Harlequin Cabbage Bug is more 

 brilliantly colored than many of our 

 stink bugs, and, at present, less 

 comm.on In Iowa. Many species are 

 characterized by a prominent lateral 

 spine on each humeral angle of prono- 

 tum. This family is a fairly large 

 one. *Stoner gives keys and descrlp- 

 rigure loo. tions for Identifying 45 Iowa species. 



* Stoner, Dayton, 

 1-140. 1920. 



The Scutelleroid^a of lo-.m. Univ. Iowa Studies Nat. '-ist, 8(4; 



77 



