424 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
Go. Phytoptus acehcola Garinan. 
This mite produces galls on the leaves of the sugar maple, Acer sac- 
char inum Wang. 
In live examples of this mite the strire were counted, and in three of 
(hem numbered 30, and in the other two 28 and 29, respectively. The 
prongs of the feather-like appendage seem to be three. The length is 
about .0075 inch. This form was found iu June both among knobbed 
hairs and in galls on the sugar maple, but there appeared to be only 
one species represented. 
The gall is very slender, tapers to both extremities, and bears a 
strong resemblance in general form to the nail galls described by Prof. 
C. V. Riley from the leaves of Ampelopsis. The walls are uniformly 
thin, and present no internal roughness. The height is about .19 inch, 
and the diameter .045 inch. Phytopti were abundant in these galls 
collected at Bloomington, 111., June 22, 1881. (Forbes' Third Report.) 
The following insects also occur more or less constantly on the maple : 
Order Coleoptera.* 
66. Dicerca divaricata Say. Observed by Mr. F. B. Caulfield apparently 
ovipositing on a dead maple, June 12. (Can. Ent., xviii, p. 196.) 
67. Chrysobothris femorata Lee. 
63, Molorchus binaculatus Say. Bred from a small twig of a young 
wild maple. (Chittenden in letter.) 
69. Xylotrechas colomis Fabr. (See Oak Insects, p. 77.) Found by Mr. 
G. Hunt under the bark of an old sugar maple in northern New 
York. 
70. Saperda tridentata Oliv. Pupae found in a maple trunk. (W. H. 
Harrington, Rep. Ent. Soc. Ontario for 1883, p. 35.) 
Order Lepidoptera. 
71. Edema albifrons (Abbot and Smith) Larva common on the maple 
at London, Canada. 
72. Eeterocampa unicolor Pack. 
73. Heterocampa guttivitta Walk. Brunswick, Me. 
74. Callosomia promethea (Drury). 
75. Schizura ipomew Doubld. 
76. Xadata gibbosa (Abbot and Smith) Lintner. (Contr., iii, p. 150.) 
Reed. (Rep. Ent. Soc. Ontario, 1883, 16.) 
77. Limacodes scapha Harris. (S. Lowell Elliot, MS. notes.) 
78. Emprctia stim idea Clemens. Soft maple, St. Louis. Miss Murtfeldt. 
(Bull. 13, Div. Ent., p. 62.) 
* The following occur iu decayed maple wood and stumps: Alaus oculatus Linn., 
(Devereaux, MS. notes); Qemoderma scabra Beauvois (Devereaux, MS. notes); 
Pyrochroa JiabeUata Fabr., Pyrochroa femoralis Lee. 
