230 



Sod Web-worms Injurious to Corn. 



SiumII, MC'livo, reddish brown caterpillars, an inch long or less, willi cdnspieuous 



slnninfi brown si)()fs, eacli with a sironj;; hair arising from near its center 



(Kig. 20, 22). 



Ib'ad pale, with darker markings. 2 



Head black The Vagal)ond Cramlms {vuhjivagellus) , p. 41 



2. A smooth shining spot behind the substigmatal spot (Fig. 141, n) 



Crainhiis luteolellus, p. 41 



No smooth shining spot behind the substigmatal spot (Fig. 141, b). 3 



3. No stripes except for the rows of shining spots (Fig. 20) 



The Connnon Sod Web-worm, p. 41 



A dark dorsal line; an indefinite pale border about each dark spot (Pig. 22). 

 The Striped Sod Web-worm, p. 41 



Insects Eating Irregular Holes in the Leaves 

 or Notching the Edges. 



Caterpillars either smooth or hairy. 2 



Beetles (Coleoptcra). ■ l.'> 



Leaf-cutting ants p. 159 



2. Caterpillars conspicuously hairy, more than six long hairs on the back of 



each segment (Fig. 39, a; 159). 3 



Caterpillars nearly smooth, not more than six long hairs on the back of 



each segment. 1 1 



3. The hairs of the caterpillar dense, at least partly concealing the body 



(Woolly Bears, p. 70). 4 



The hairs of the caterpillar not dense nor concealing the body. 9 



4. Hairs very dense, projecting like a l)ottle-l)rusii. Orange-red on middle 



part of body, black at ends, (Fig. 39, a,) head black, often lighter on 



the middle line (Fig. 48, d) The Hedgehog Caterpillar, p. 72 



Hairs less dense, color longitudinally uniform. 5 



5. Head not entirely black, no conspicuous white line down the back. 6 



Head black; hairs also black Apantesis phyllira, p. 76 



Head black, a whitish line down the middle of the back. 7 



6. Head whitish to brownish (Fig. 48, c), hairs white to dark brown (Fig. 



46, a) The Yellow 15ear, p. 72 



Head with a broad black band extending back on each side, clypeus with 

 at least the middle line and sides pale (Fig. 48, a, b), hairs brown to 

 black (Fig. 43) The Salt-marsh Caterpillar, p. 72 



7. Caterpillar over an inch long when mature. 8 

 Caterpillar not over an inch long, hairs black (Fig. 41) . . . Eubaphe rasa, p. 71 



8. Hairs of back blackish, those of sides brown (Fig. 52, 53) 



A pantesis phaleratn, p. 76 



Hairs of back brown, those of sides reddisli white, dorsal stripe broad.. . 

 ^4 pa7itcsis argc, p. 75 



9. The head, body, and hairs greenish, the latter spiny, black-tipped, poison- 



ous, arising from a tapering base. Mature caterpillar two and a half 



inches long (Fig. 159) If i/ perch iria to, p. 168 



The head marked with black; the hairs soft, arising from roimded 

 cushions, not poisonous. 10 



10. A bright yellow stripe each side (Fig. 162) .The Smart weed Caterpillar, p. 170 

 Sides not striped with yellow (Pig. 66), caterpillar defoliating trees and 



spnvuling to other plants. Eastern The Gypsy-moth, p. 87 



11. A thick, short caterpillar, flattened beneath, without evident feet, the back 



l)rown, with a green saddle-mark, each end with a pair of projecting 



horns armed with poisonous spines (Pig. 165) 



The Saddle-back rateri)illar, p. 173 



A large cylindrical caterpillar with a sharp tail-horn and a row of eye-like 



spots each side (Fig. 156) Thcnira tersa, p. 167 



Caterpillar smooth, without projecting horns. 12 



12. Head brown or black, without longitudinal stripes. 13 

 Head pale, with a pair of longitudinal dark lines. . 14 



13. A striped caterpillar with a row of brown patches each side of the 



back, and a brown patch on the side of tlie fourth segment behind 

 the head (Fig. .55, 56, .57) The Cotton Cutworm, p. 79 



