28o ECONOMIC ENTOMOLOGY 



Pupa. — Formed where larva lives, often enclosed in a small silk 

 cocoon, covered with dust. Duration about 12 days in warm con- 

 ditions, but may be more than a year under unfavorable conditions. 



Cat and Dog Flea (Pulex serraliceps GeTv.=Ctenocephalus cams 

 Curtis). Adult. — ^Like that of House Flea but with a comb of spines on 

 border of head and pronotum. Adheres quite closely to its host. 



Eggs. — ^Laid loosely among the hairs of host; small white and oval; 

 hatch in about 2 weeks. Collect on mats. 



Larva. — At first white, footless, maggot-like; head pale yellow; 

 feeds on decaying particles of animal and vegetable matter; matures in 

 summer in about 12 days. 



Pupa. — Duration 12 to 16 days in summer in a cocoon. This flea 

 may be found in winter in any of the stages. Several broods each 

 season. 



Control. — Bathe the animals frequently in a 3 per cent, creolin 

 solution (4 teaspoonfuls to a quart of water) ; provide them with sleep- 

 ing mats and have these mats beaten or shaken regularly once a week; 

 keep the kennel clean; dust fresh pyre thrum thoroughly among the 

 hairs of the animals and on the floors; remove carpets or mats and 

 give floors a thorough cleaning with soapsuds and later with benzine; 

 dust powdered alum upon the carpets, etc. 



Treatment of bites with a 3 per cent, carbolic acid solution, 

 menthol, camphor or carbolated vaseline will allay the irritation. 



COLEOPTERA (BEETLES) 



Chief Groups of Beetles 



A. Head of the ordinary form, not prolonged into a narrow beak; maxUlae 

 divided; palpus flexible, usually 4-jointed; larvae rarely without legs. — 

 True Beetles (Fig. 181). 

 B. All tarsi with the same number of segments. — Isomera. 



C. Fourth and fifth tarsal segments not grown together. — Penlamera 

 (Fig. 182). 

 D. First three ventral segments of abdomen grown together; 

 most OTth thread-like antennae. — Carnivora or Predaceous 

 Beetles. 

 DD. First ventral segments of abdomen not grown together. 

 E. Antennas club-shaped. — Clavicornia or Club-horns 

 (Fig. 183). 

 EE. Antennie serrate. — Serricornia ox Saw-horns (Fig. 184). 



