A. E. Verrill — The Bermuda Islands. 819 



have four long, pale wing-pads, which are nearly equal; the females 

 have but two. Larvae yellowish white and light yellow. 



A few males were found ; these have two pairs of wings, which 

 exceed the body by about one-third of their length ; the two pairs 

 a::e nearly equal in length and of nearly the same form, but the under 

 wings are transparent, without color markings, and more evenly 

 rounded distally ; the median vein of the latter divides near the 

 middle into four branches, of which the distal branch forks once; 

 the fore wings have the brown markings lighter than in the female, 



192a 193 



193a 



Figure 192a. — Heteropsocus ilisjim- V. ; wings of male, more enlarged. Figure 

 193. — Louse of tropic-bird; x (J 1 2 ; 193a, the same, dark variety; x 6. From 

 drawings by A. H. V. 



and interrupted in the middle, the distal part forming an irregularly 

 stellate or palmate spot, with a veinlet along the middle of each 

 lobe ; the three distal branches are bifurcated. Abdominal append- 

 ages short, tapered, incurved, hairy, close together; ocelli three, in a 

 triangle between eyes. Length, 1.25 mra . 



The Book-louse (Atropos divinatoria) is common. Fig. 194. 



I. — Mallophaga ; Bird Lice. Doubtless numerous species occur on 

 poultry, and on the various wild birds that visit Bermuda, but they 

 have not been collected hitherto.* 



Tropic-bird louse. [Trinoton luridum Nitz.) Figure 193, 193a. 



I am indebted to my son, Mr. A. PI. Verrill, for several specimens 

 of this large species, from the Bermuda Tropic-bird. The thorax is 

 dark brown or black, the sutures bordered with yellow, and each 



* Numerous American species are described and figured by Prof. F. V. Kellogg, 

 in Proc. Calif. Acad. Sciences, vol. vi, pp. 31-168, 431-548, 2N plates, 1896 ; 

 Occas. Papers Calif. Acad., vi, pp. 1-224, 17 pi., 1899; Journ. N. York Entom. 

 Soc, x, p. 20; List of North American Mallophaga, Proc. U. S. Nat. Mus., xxii, 

 pp. 39-100, 1899. See also Osborn, Bull. U. S. Nat. Mus., No. 7. 



