290 



ORDER SIPHON A PTERA 



of locomotion. The adults have suctorial mouth parts and 

 puncture various kinds of animals, suckinji; the blood for a 

 food supply. The larvte are slender and live in refuse and 

 rubbish, litter of do<i kennels, etc., and when mature change 

 to a very distinct pupa stage and then to adult flea. The 

 ]nipa stage is like the adult in shape but the legs, etc., are 

 encased in the rigid pupa case. The hindlegs are specially 



Fig. 234. — Cat and dog flea (Cttnuttphalus ciniis): a, egg; b, larva in 

 cocoon; c, pupa; d, adult; e, mouth-parts of same from side; /, antenna; 

 0, labium from below; b, c, d, much enlarged; a, e, f, g, more enlarged. 

 (After Howard.) 



developed and their mode of progression is by leaping. 

 They occur on different kinds of animals, as the dog and cat, 

 and there are species that occur in houses, on squirrels, 

 rats, mice, and various mammals. It is mainly on the 

 smaller species of mammals, and one species occurs on birds. 

 One species attacks poultry. It buries itself in the skin 

 something like a jigger, though not so extreme in the extent 

 to which it will burrow. 



