841 A. E. Verrill—The Bermuda Islands. 429 
parasitic on Orthezia insignis has been mentioned above (p. 806). 
Mr. Banks says it is a Zyroglyphus, but the specimens were 
too imperfect for specific determination. 
Orange Rust-mite. (Phytoptus oleivorus Ashm.) Fig. 225. This 
has been recorded as occurring on oranges in Bermuda, (see Riley 
and Howard, Insect Life, iii, p. 120, Nov., 1890.) It is a very 
minute species which causes the rusty patches on oranges. 
Figure 224.—Cattle Tick (Ixodes bovis R.); after Riley. Figure 224a.—Mange- 
mite of cattle; after Murray. Figure 224b.—Bird-mite (Dermanyssus avium); 
after Murray. Figure 225.—Orange-rust Mite (Phytoptus oleivorus). Figure 
226.—Cheese Mite (Tyroglyphus siro), after Howard. All much enlarged. 
Cheese Mite. (Tyroglyphus siro (L.) Figure 226. This occurs 
in old cheese, as in Europe and the United States. 
Tropic-bird Mite (Alloptes phaéthontis Gmel. {t. N. Banks.) 
Several specimens of a small, dark brown mite, from .50 to .75™™ 
long, were found on the Tropic-bird by A. H. Verrill. The body is 
rather narrow, oblong, subacute at each end. Legs about half as 
long as body. Four caudal bristles, about as long as body. 
Megninia equinoctialis Trouess. (t. N. Banks.) 
Associated with the above was a single specimen of this larger 
species, having the posterior legs much longer than the others; 
body ovate; abdomen tapered, subacute. 
Leaf-mites ; Red Spiders. (Tetranychus.) Two or more species 
of this genus were observed on garden plants, but were not carefully 
studied. The common form was, apparently, 7. bimaculatus (fig. 
227), common in the United States. This species usually has a red 
