6. 



Heteromcinhola. — 1. MetdinorpJtosis in a large ntimher incomplete. 

 2. Body usually flattened. 3. Prothorax large and squar- 

 ish. 4. Mouth-parts usually adapted for biting (Heter- 

 optera and Homoptera, haustellate). 5 Pupa often in- 

 active. 6. Larva flattened, often resembling the adult. 



Sub-Ordkes. 



6 



COI-EOP- 



TKRA. 



HoMdP- 



'I'ERA. 



IlE'LM'^lKtP- 



TKltA. 



ORTHOP- 



TKPvA. 



nki;r(_>p- 



TERA. 



Sub-order T. — 1. Provided with jaws for biting. 2. Ligula (for] 7 



lapping nectar) greatly developed 3. Four wings with I „y-,,T5,yf^p 



few and irregular veins. 4. Hinder pair smaller. 5. | tERA 

 Female with piercer or sting. 6. Head large with large [ 

 compound eyes and three ocelli. 7. Transformation com- ^?''"-^';^''[''t®" 

 plete. 8. Larva maggot-like (mostly) and very unlike | .<eets.)" 

 the adult. 9. Pupa with It-gs and wings unconfined. J 15— ii 



Sub-order II. — 1. Mouth with spiral sucking tube. 2. Head | 8 



small with large clvpeus. 3. Wings four, covered with ! ^ 

 scales. 4. Transformation complete. 5. Larvae are [ i-era. 



caterpillars, — worm-like, with six true leg.'?,, and four to ten 

 fleshy prop legs. 6. Pupa with wing cases and legs in- 

 distinct, and soldered to the breast. 



(Scale-wing 

 el Insects. 



30—58. 



9 



Sub-order III. — 1. Horny or fleshy proboscis. 2. Two wings. 1 diptera. 



3. Two knobbed threads( "balancers'" or "poisers") behind ?■ (Tvvo winged 



4. Transformation complete. 5. Larvae are maggots. I •'irL'j:'^" 



Snh-order IV. — 1. Jaws. 2. "Two thick wing covers, called] 10 



elytra. 3. Elytra meet in a straight line on the top of • *n^'i'p'?^'~ 



the back. 4. Two filmy wings folded transversely. 5. ^ (.sheath- 



Transformation complete. G. Larvae are called grubs. | wiugd In- 

 7. Pupa with wings and legs distinct and unconfined. J 



sects.) 

 70— S9 



Sub-m'der V. — 1. Head triangular and small, with horny beak for 

 suction. 2. Face either vertical or sloping obliquely 



under the body so that the beak lies at rest close to the 

 breast. 3. Fore pair of wings are generally transparent 

 and usually net-veined, lying with the hinder pair, which 

 are considerably smaller, roof-like upon the body. 4. 

 The wings do not cross each other. 5. The three seg- 

 ments of thorax united in a mass, and prothorax gener- 

 ally shorter than mesothorax 6. Transformation partial. 

 7. Larva and pupa nearly like the- adult; but wanting 

 wings. 8. Species terrestrial, feed on vegetable juices, j 

 and are usually small. J 



11 



HOMCiP- 

 TERA. 



(Unitbnn- 

 wiiitreil In- 

 sect.-:.) 



90-95 



12 



Sub-order VI. — 1. Head tria7)gtilar, flattened, and small, with 

 horny beak for suction; head held horizontally. 2. Four 

 wings. 3. Uppermost wings thick at the base and thin- 

 ner at the extremities; lie flat and cross each other on top 

 of the back. 4. Prothorax largest segment of thorax. \ (J^t^^^ j,,^ 



IJETEROP- 

 TERA. 



5. Transformation partial, 

 adult, but wanting wings, 

 and many are of large size, 

 others on vegetable juices. 



6. Larva and pupa like the 



7. Species in part aquatic, 



8. Some feed upon animal, 



f'oi iii-wingoil 

 Insects.) 



9(5-103 



