HOW TO KNOW THE INSECTS 



7a Wings wholly or for the most part covered with scales. Mouth- 

 parts formed for sucking. (Moths and Butterflies) Figs. 41 and 



178 to 198. 



Order XXI, LEPIDOPTERA p. 89 



Fig. 41. A Moth. Celerlo 

 llneata Fab. Tne ?/hite-lined 



■"igure 41, 



Sphinx. 



Body and front wings olive brown 

 marked vjith white; hind wings 

 black with mid-band of red. Often 

 seen hovering around petunias at 

 dusk, and called the humm.lng-bird 

 moth. Its wings cover an expanse 

 of three inches or more. (from 

 U.S.D.A.) 



Scales characterize this order 

 very much as feathers character- 

 ize birds. The broad wings (a few 

 females have no wings) are usually 

 "shingled" with beautiful designs 

 in colored scales. For the most part, the adults are both hand- 

 some and harmless, but that does not free them with the ji^ry. The 

 children of m.any species have terrible v/ays as vie?.^ed by man, and 

 year after year he' pays heavily for their destructiveness. These 

 caterpillars have three pairs of jointed legs and from two to 

 five pairs of fleshy pro-legs. 



7b Wings transparent or thinly clothed with hairs (as in the 

 bees, Mayflies, dragon flies, etc.) 8 



8a Mouth parts a tube for sucking, attached to hinder part of 

 the lower surface of the head. Wings when at rest sloping down 

 and outward from center, thus/V. (Cicadas, Leafhoppers, 

 Treehoppers, Aphids, etc.). Figs. 42 and 165 to 173. 



Order XVIII, HUMOPTERA, p.83 



Fig. 42. Empoasca mali Le B. The Potato 

 Leaf hopper. 



Pale green. Common in all stages on potato 

 plants where it causes hopper burn. Length 

 about 3 mm., (from U.S.D.A.) 



The Homoptera are alike in that their mem- 

 branous wings slope roof like over the body. In 

 size, shape, markings and habits they vary 

 widely. They are vegetable feeders. Their 

 sucking tube makes their feeding less conspic- 

 uous but the damage they do to plants is large. 



Figure 42, 



8b Not as in 8a 9 



9a Slender, moth-like insects, with long, slim antennae; no 

 mouthparts in evidence except a pair of slender palpi (a). Wings 

 frequently hairy; usually broadest beyond the middle. (Caddis 

 files) Fig. 43. 



Order XX, TRICHOPTERA 

 40 



