Ctenocephalides canis (part 2)

about Ctenocephalides canis :)

Anterior end. 
The head of Ctenocephalides sp is rounded on its upper and anterior surface. Ctenocephalide canis, the dog flea, has a sharp curve here; Ctenocephalides felis felis, the cat flea, has a shallow curve.Ctenocephalides canis usually has three or four setae on the metepisternum; the others species usually have only one or two.

Hind tibia. 
Between the postmedian and apical long setae on the trailing edge of the hind tibia of Ctenocephalides canis there are two notches bearing short, stout setae. All of the other species have only one notch that bears stout setae.

Second instar cat flea larvae. 
The larvae of all three instars feed principally on the feces of the adult flea which is only slightly digested dried host's blood and, until the larva is about to pupate, it keeps its gut full of it.





Third instar cat flea larva. 
The larvae moults twice, the final instar being about 5.0 mm long. At the end of its development, the larva empties the gut and spins a whitish, loose, ovoid cocoon, and becomes a pupa.