ENTOMOLOGY IN OUTLINE — IIEMIPTERA. 41 



THE LONG-HORNED BUGS. Bugs with antennse at least as long as the head, and 

 prominent except in the Phymatidce, where they are concealed under the sides of 

 the prothorax. 



The Semi-aquatic Bugs. 



The Shore-bugs. Family Salidida\ 



The Broad-shouldered Water-striders. Family Veliidte. 



The Water-striders. Family Hydrobatidse. 



The Marsh-treaders. Family Limnobatidse. 

 Thb Land-Bugs. 



The Land-hugs vrith four-jointed antennx. 



The Thread-legged Bugs. Family Emesidse. 



The Assassin-bugs. Family Reduviidae. 



The Damsel-bugs. Family Nabidse. 



The Ambush-bugs. Family Phymatidse. 



The Flat-bugs. Family Aradidse. 



The Lace-bugs. Family Tingitidse. 



The Bedbug and the Flower-bug's. Family Acanthiidse. 



The Leaf-bugs. Family Capsidse. 



The Red-bug Family. Family Pyrrhocoridse. 



The Chinch-bug Family. Family Lygseidse. 



The Stilt-bugs. Family Berytidte. 



The Squash-bug Family. Family Coreidse. 

 The Land-bugs with five-jointed antennas. 



The Stink-bug Family. Family Pentatomidse. 



The Burrower-bugs. Family Cydnidse. 



The Negro-bugs. Family Corimelsenidse. 



The Shield-backed bugs. Family Scutelleridse. 



Many of these are of little interest to us and can be dismissed with 

 a mere allusion. 



Family Copisidse (Water-boatmen). These are smallish insects, less 

 than half an inch in length, and frequent pools, streams, and ponds. 

 They are surrounded by a film of air and look like a bubble in the 

 water, as they are seen usually on the bottoms. They are generally 

 distributed over the United States, and are predaceous on other water 

 insects. They have no economic importance with us, but in some parts 

 of Mexico they are so numerous, in the ponds that aquatic plants upon 

 which they have deposited their eggs are gathered, dried, and beaten in 

 order that the eggs may be secured for food. 



Family Notoneetidse (Back-swimmers). These are aquatic bugs^ 

 their backs shaped like the bottom of a boat. They always swim on 

 their backs, hence the common name. Their hind legs are oar-shaped, 

 and they pass through, the water with their aid with great rapidity. 

 They prey upon young fish, and probably are destructive in this respect. 



Family Nepidse (Water-Scorpions). This is another of the aquatic 

 bugs, and derives its common name from the possession of a long 

 respiratory tube, at the end of the abdomen, which gives it a strong 

 resemblance to the land-scorpion. There are two distinct types of 

 these insects, one having an oval, flat, thin body, the other a linear and 



