March, 1904.] COQUILLETT : DiPTERA FROM SOUTHERN TeXAS. 31 Tillus occidentalis Goch. Tarsostenus univittatus Rossi. Teretrius lebatus Horn. A small wasp. Lyctus were very plentiful. I could count sixty of these before I was able to detect one of the other species. This adobe wall was two years old and as hard as stone, yet the larva of Lycius had no difficulty in accomplishing the immense work of boring through this composi-tion and changing the solid interior into a powdered substance analo-gous to flour. The three Cleridse are undoub edly parasites of Lyctus and the little wasp is also a parasite of either Lyctus or one of the Cleridse. Elasmocerus californicus came out only in the forenoon between half past nine and half past eleven o'clock ; the other insects were more abundant toward evening. I did not take these insects at any other place, with the exception of Tillus occidentalis. This species would frequent also old logs, and toward evening would peep out of holes bored by Scolytidae. On some occasions they would come out and run about a little, but it would not be long before they would return to these holes. Class I, HEXAPODA. Order IV, DIPTERA. DIPTERA FROM SOUTHERN TEXAS WITH DESCRIPTIONS OF NEW SPECIES. By D. W. Coquillett, Washington, D. C. During the past summer Mr. Charles Schaeffer spent several months collecting insects, chiefly Coleoptera, in the vicinity of Brownsville, Texas, in the interest of the Brooklyn Institute of Arts and Sciences, and secured, among other things, a small but very interesting collection of Diptera, a series of which was submitted to the writter for naming, and has been returned to the Institute again. This series contained representatives of nine apparently new species besides eight other species which, so far as I am aware, have never been recorded from the United States, their most northern accredited habitat being in
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