166 MONOGRAPHIA 



Lipeurus polytrapezius. Nitzsch. Germ. Mag. iii. p. 293. Burraeistcr 

 Handbuch ii. pt. ii. p. 434. Pediculus Meleagridis. Linnseus, Syst. 

 Nat. ii. 1020.31. Faun. Suec. 1958. Fabricius, Syst. Ent. 809. 28. 

 Syst. Inst. ii. 482. 32. Frisch. Inst. Aus. 8. tab. 4. 



Head long, panduriforai ; clypeus semicircular, with a 

 black conical band on each side before the antennae, and 

 spot before the eye, base rotundate, with a narrow black 

 margin ; eyes large and prominent ; antennae as long as 

 the head in the male, the first joint large and conical, with 

 a small obtuse tooth at the base, the remainder as in the 

 preceding, in the female the first joint short and thick, 

 second long and conical, remainder growing gradually 

 smaller ; prothorax quadrate, and narrower than the head ; 

 metathorax long, cylindrical, truncate posteriorly, with a 

 fasciculus of hairs from a fovea on each side; abdomen 

 elongate ovate, pale yellow -white, the segments with a 

 greyish brown trapezoidal spot on each side, margined in- 

 ternally with pitchy-brown, lateral margin together with 

 that of the thorax black ; legs long and slender, fulvous 

 yellow, with the superior and inferior margins pitchy-brown. 

 Length $ l $ If. 



A common parasite upon the Turkey (Meleagris gallo- 

 pavo). Their mode of progression is rather singular, as 

 well as rapid. They slide as it were sideways extremely 

 quick from one side of the fibre of a feather to the other, 

 and move equally well in a forward or retrograde direction, 

 which, together with their flat polished bodies, renders them 

 extremely difficult to catch or hold. I have observed that 

 where two or more genera infest one Bird, they have each 

 their favourite localities, for while the Goniodes stylifer will 

 be found on the breast and neck of the Bird, the Lipeurus 

 polytrapezius will be congregated in numbers on the webs 

 and shafts of the primary wing feathers. 



