346 R. OSTEN SACKEN. 



Diplosis resinicola, n. sp. — Length 0.12 — 0.14 of an inch. Male antonn.-t* 

 not much shorter than the body, of dark color, except the scapus, which is red- 

 dish; 2x24 jointed, flagellum with small, subglobular joints alternating witii 

 double, subcylindrical ones; pedicels between the joints about equal to the 

 diameter of theshorter joints, somewhat longer towards theend of the antennje. 

 joints verticillate, the length of the hairs of the verticils not exceeding the 

 length of joints. J^e?na/e antennce less than half as long as the bod}', 2x12 joint- 

 ed ; joints of flagellum subcylindrical, more than twice longer than they are 

 broad, the basal ones being the longest; pedicels short: the hairs, clothing the 

 antennas, are shorter than each single joint. Head strongly gibbous above, 

 which gibbosity is very striking, when viewed in front or from the side; the 

 black eyes being absolutely confluent, and covering the whole gibbosity, occupy 

 nearly the whole surface of the head, except a small space round and below the 

 antennajand a portion of the occiput, which are brownish red (the brown pre- 

 dominating in several specimens). The ground color of thorax is reddish ; the 

 dorsal portion however, including the seutellum, are grayish brown ; rows of 

 yellowish hairs indicate the direction of the ordinary stripes (when rubbed off 

 these hairs show gray stripes under them); the middle stripe is divided in two 

 by a grayish longitudinal line; pleurae and sternum reddish, mixed with 

 brownish gray; abdomen reddish, with grayish-yellow hairs, long and erect 

 along the sides, short and appressed on the back; genitals pale. Feet brown- 

 ish, with a yellowish-gray, appressed pubescence; some longer hairs on the 

 underside of the femora halteres; with dark knobs. Wings gray, second longi- 

 tudinal vein arcuated in its latter portion, ending immediately beyond the 

 apex of the wing. 



Described from 4 % , and 7 9 , specimens, before they were dry. 



The extraordinary shape of the head will render the recognition of 

 this species easy. 



Observation. — The antennae of this species, in both sexes, are ex- 

 actly similar to the pair of antennae figured by Winnertz in Liiiu. 

 Entom. VIII, tab. ///, fig. 7, a. b. Now these figures represent the 

 antennae of Diplosis pini, Degeer, a species which forms a cocoon of 

 resin on pine leaves, (An American species, called by me Ccc. pini 

 inopis, has exactly the same habit; compare monographs of N. A. 

 Diptera, Vol. I, p. 196). But, beyond this resemblance of the an- 

 tennae, the perfect insects in both species are very distinct, as well as 

 the larvae and the pupae. (The larvae of D. pini, it may be remem- 

 bered, has two rows of peculiar fleshy tubercles along the back.) 



2. A gall of Cecidomijia, on the wild cherry, (^Ceciilomijia cerasi 

 serotinse, n. sp. 



The terminal buds of young shoots of the wild cherry (Cerasus 

 serotina), are enlarged, sometimes to the size of a cherry; the gall is 

 red, more or less rounded ; one or two leaves issue from its sides; sur- 

 face more or less even, except the apex, which is irregular, showing the 



