q6 
Parasitic Arthropoda 
Only the females suck blood. They attack not only man but all 
warm-blooded animals and, according to recent workers, also cold¬ 
blooded forms, such as frogs, lizards, and larvae. Indeed, Townsend 
(1914) believes that there is an intimate relation between Phlebotomus 
and lizards, or other reptiles the world over. The Phlebotomus 
passes the daylight hours within the darkened recesses of the loose 
stone walls and piles of rock in order to escape wind and strong light. 
Lizards inhabit the same places, and the flies, always ready to suck 
blood in the absence of light and wind, have been found more prone 
to suck reptilian than mammalian blood. 
On hot summer nights, when the wind is not stirring, the Phleboto¬ 
mus flies, or sand-flies, as they are popularly called, invade houses and 
sleeping rooms in swarms and attack the inmates. As soon as light 
begins to break the flies either escape to the breeding places, or cool, 
dark places protected from the wind, or a part of them remain in the 
rooms, hiding behind pictures, under garments, and in similar places. 
Wherever the Phlebotomus flies occur they are an intolerable nui¬ 
sance. On account of their small size they can easily pass through 
the meshes of ordinary screens and mosquito curtains. They attack 
silently and inflict a very painful, stinging bite, followed by itching. 
The ankles, dorsum of the feet, wrists, inner elbow, knee joint and 
similar places are favorite places of attack, possibly on account of 
their more delicate skin. 
Special interest has been attracted to these little pests in recent 
years, since it has been shown that they transmit the European 
“pappatici fever” or “three day fever.” More recently yet, it 
appears that they are the carriers of the virus of the Peruvian “ver¬ 
ruga.” This phase of the subject will be discussed later. 
Control measures have not been worked out. As Newstead says, 
“ I11 consideration of the facts which have so far been brought to light 
regarding the economy of Phlebotomus, it is clearly evident that the 
task of suppressing these insects is an almost insurmountable one. 
Had we to deal with insects as large and as accessible as mosquitoes, 
the adoption of prophylactic measures would be comparatively easy, 
but owing to the extremely minute size and almost flea-like habits of 
the adult insects, and the enormous area over which the breeding- 
places may occur, we are faced with a problem which is most difficult 
of solution.” For these reasons, Newstead considers that the only 
really prophylactic measures which can at present be taken, are those 
which are considered as precautionary against the bites of the insects. 
