458 ARTICULATES I INSECTS. 



PsEUDO-ScORPiONES, Latr. This Family comprises 

 small tracheary, scorpion -like animals represented by 

 Chelifer, which has a flattened abdomen, the palpi en- 

 larged and bearing a claw at the extremity much like 

 that of a lobster. One minute species is common in 

 books and neglected drawers. 



PHALANGITA, OR LONG-LEGS FAMILY. This Family 

 embraces tracheary arachnids which are popularly known 

 as Daddy-long-legs, or Harvest-men, and which are at 

 once distinguished by the round oval body and long slen- 

 der legs, which are very easily detached. 



ACARINA, Nitsck., OR MITE FAMILY. This Family com- 

 prises very small, and in many cases microscopic, tra- 

 cheary arachnida, some of which are found almost every- 

 where, and which have the forward region joined in a 

 mass with the abdomen, and not divided apparently into 

 rings. The majority are parasitic on other animals. 



The Genus Trombidium includes the little, square, vel- 

 vet-red mite seen in spring in flower-beds. Gamasus is 

 found on beetles. Acarus causes the loathsome disease 

 known as the itch, by burrowing in the skin and flesh 

 of the unfortunate victim. Ixodes lives in the woods, and 

 attaches itself to animals, and is known as the Tick. 



SUB-SECTION IX. 



THE ORDER OF MYRIAPODA, MYRIAPODS, OR CENTIPEDES. 



THIS Order comprises insects which have a very long 

 body, made up of numerous, and generally equal, seg- 

 ments, each of which generally bears two pairs of feet, 

 Fig. 35 8. mostly terminated with a 



single hook. Their organs 

 of sight consist of a few 

 ocelli. The larvae when 



American Myriapod^or Galley-Worm, hatched generally have nine 



