PHLEBOTOMUS 



807 



normally of sixteen segments. The thorax is mainly mesothorax, 

 the prothorax being very diminutive, but the scutellum and post- 

 scutellum are well developed. Wings hairy, narrow, with second 

 longitudinal vein twice forked, thus forming one of the two simple 

 veins between the forks of the second and fourth longitudinal 

 veins, the other simple vein being the third longitudinal. The 

 cross veins are placed near the basal fourth of the wing. Legs very 

 long and slender, and densely clothed with scales. Ungues simple. 

 The abdomen has ten segments, the last being modified for the 

 genitalia, which in the female are flattened, leaf-like structures, and 

 in the male very complex structures composed of superior claspers, 

 inferior claspers, submedian lamellae, and intermediate appendages, 

 and a penis. 



The buccal cavity is wide in front and narrow behind, M^here it 

 leads via the pharynx into the oesophagus, which divides posteriorly 



Fig. 403. — Phleboiomus duboscquii Neveu-Lemaire, 1906. 

 (From a photograph by J. J. Bell.) 



into two tubes, one leading to the sucking and the other to the 

 mid-gut, at the posterior extremity of which are situate the four 

 Malpighian tubules, after which come the small and large intestines. 

 Attention is invited to the presence of the sucking stomach, and 

 to the number of the Malpighian tubules. 



The female organs consist of ovaries, from which the tubular 

 oviducts pass to unite before reaching the base of the inferior 

 claspers. There are two spermathecse. 



The male organs are testes, seminal vesicles, ejaculatory duct, 

 pompetta or little pump— which regulates the exit of the sper- 

 matozoa — and penis. 



Lite-History. — After fertihzation the female takes a meal of 

 blood, even though she may have previously sucked blood. She 

 then lays some thirty to eighty eggs in damp places, usually cracks 

 in rocks, stones, or bricks, and in doing so is apparently much 



