20. 



Family Q. — 1. Body large. 2. Fore legs very large, spinous," 

 and raptorial. 3. Head horizontal and triangular in 



front, 4. Antennae long and filiform. 6. Prothorax 

 very long 6. Broad wings, thin and net-veined, with 



long parallel veins. 7. Abdomen long, linear oval. 



Family f. — 1. Body flattened ovate. 2. Head rounded and par-") 

 tially concealed by the expanded prothorax. 3. Fore | 

 wings large, ovate, and not much smaller than the hind I 

 wings. 4. Antennae long, filiform, and many jointed. | 

 5. Anal stylets short. 6. Color reddish brown. 7. j 

 Nocturnal, hiding by day; found under stones. J 



Family g. — 1. Body narrow and flattened. 2. Wing covers ~ 



short, coleopter-like. 3. Head free, flat, and horizontal. 

 4. Ocelli wanting: eyes round. 5. Antennae rise from 

 under the eyes, filiform, and twelve to forty jointed 6. 



Elytra short and thick; while the rounded, broad hind 

 wings are folded beneath, almost entirely concealed. 7. 

 Nocturnal; rare in the U. S. 



108 



MANT- 

 IDAE. 



(Prophets.) 



109 



BLATTA- 

 RIAE. 



(Cock- 

 roaches.) 



no 



FORFICU- 

 LARIAE. 



(Earwigs.) 



Ill 



TERMIT- 

 IDAE. 



(White 

 Ants.) 



SuB-OBDER VHI.— NEUROPTERA. 



Family St- — 1- Body of winged individuals somewat ant-shaped.] 

 2. Wings long, straight, narrow, and finely net-veined; the I 

 costa ot each wing is remarkably straight, and both wings | 

 are equal in shape, size, and venation 3. Head moder- }■ 



ate and horizontal. 4. Eyes rather small and globose. I 

 5. Antennae short, about twenty-jointed. 6. Mandibles | 

 small and triangular with fine teeth. 7. Social. J 



Family "b. — 1. Body oval. 2. Head free from the prothorax. 

 Prothorax small and partially concealed by the wings. 

 Wings unequal in size with few veins. 5. Minute, 

 semble Aphides.) 



Family Q. — 1- Body long, flattened, and sides parallel. 2A 113 

 Prothorax large. 3. Antennae long and thread-like. ' 

 4. Wings unequal, irregularly transverse veined, and 



hinder ones broad and triangular. 



j (Pcrla Fam.) 



114 



Family &.. — 1- Body slender and weak, being very long. 2.1 

 Prothorax of moderate size. 3. Antennae small and sub- } 

 ulate. 4. Mouth-parts rudimentary. 5. Wings un- 1 gp^p^j^R 



equal in size, hinder ones being much smaller or aborted. > id.vE. 

 6. Tarsi four or five-jointed. 7. Abdomen long and slen- 

 der with two or three caudal filaments. (Imago lives but a 

 few hours.) 



(May-flies.) 



Family^. — 1. Head very large and globular. 2. Thorax square 

 and large. 3. Abdomen long, slender and cylindrical 

 4. Eyes very large. 5. Prothorax greatly aborted. 6 

 Legs weak. 7. Antennae short and setiform. 8 



Mouth not furnished with palpi. 9. Wings large, dense 

 ly reticulated, usually equal in size, though hind pair some 

 times larger. 10. Tarsi three-jointed. 



115 



LIBELLU- 

 LIDAE. 



(Mosquito 

 Hawks.) 



