HOW TO KNOW THE INSEQS 



5b Without pinchers at the end of the abdomen. (Beetles) 

 Figs. 38 and 87 to 146. Order XI, COLEOPTERA p. 55 



Fig. 38. A Beetle. Dlabrotlca duodeclmpunctata (Fab. ) 

 The Spotted Cucumber Beetle. 



Pale yellowish green, marked with black. Length 

 5-7 mm. (from U.S.D.A.) 



The Beetles belong to our largest and best known 

 order of Insects. Their structure, size and beauty 

 make them particularly attractive to the amateur 

 collector. In 1909 Professor H. F. Wlckham *listed 

 2065 Iowa species. Many others have been added 

 since then. The beginner in entomology need not 

 fear, however, that possibilities in this group are 

 exhausted. It is a comparatively easy thing to 

 find species not heretofore reported for the state, 

 and there is no end of other matters needing to be known about the 

 beetles. 



6a Front wings leathery at base (a), membranous and overlapping 

 at the tip (b). Mouth parts fitted for sucking. (True Bugs). 

 Figs. 39 and 147 to 164. Order XVII, HEMIPTERA p. 76 



i'i5;ure 08 



Fig. 39. A True Bug. Orlus Insidlosus Say 

 The Insidious Flower Bug. 



Black with whitish spots on corlum and 

 membrane of wing. Although only two milli- 

 meters in length, it bites viciously. Des- 

 troys chinch bugs and other small Insects, 

 (from U.S.D.A.) 



(Family 17, Anthocoridae ) 



Figure 39. 



fJ^ xE'*°"l vvings leathery with veins; hind wings folded lengthwise. 

 Mouthparts for chewing. (Crickets, .Roaches, Katydids, Grasshoppers, 

 etc.) Figs. 40 and 73 to 79. Order VII, ORTHOPTERA p. 52 



Fig. 40. A Cricket. Gryllus assimilis Fab. The 

 Common Field Cricket. 



Black or dark brovm with parts of the body some- 

 tlm.es dull yellow or reddish brown. This species 

 is separated into a number of varieties. Length 

 of body 14-25 mm. 



Some systematists would make several orders out 

 of what is here called the Orthoptera and there 

 might seem to be good reason for it since there 

 are such radical differences among the included 

 species, - Grasshoppers, Roaches, Crickets, Walk- 

 ing sticks etc; they figure large in man's 

 affairs and are well worthy of our interest. 



Figure 40. 



*A List of the Coleoptera of Iowa, H. F, Wickham, Bui, Lab. Hat, Hist,, State Uni- 

 versity of lovra.. Vol. VI, 



39 



