(2 
Gaurax aranee Coq.—Adults were bred March 2 and 9, 1886, from 
an egg sac of Argiope riparia Hentz. Others were received from Dr. 
A. Davidson, Los Angeles, Cal., who reported having bred them from 
larve found among spiders’ eggs. 
Genus ELACHIPTERA Macq. 
The rearings indicate that the larve of this genus usually attack 
plants not previously injured by other insects, but a few evidently live 
in the deserted burrows of other insects; and while the greater number 
evidently feed upon living vegetable matter, a few were found in sit- 
uations which indicated that they prefer decayed to living vegetable 
matter. 
EHlachiptera longula Loew.—On August 14, 1884, several plants of 
Panicum crusgallt were received from F. M. Webster, Oxford, Ind.; the 
upper parts of these plants were infested with the larve of this insect, 
the adults of which issued on the 22d and 30th of the same month. 
Two adults issued July 15, 1886, from plants of oats received on the 
2d of the same month. Others were received from W. B. Alwood, 
Columbus, Ohio, who reported having bred them from oats. 
From a number of plants of fall wheat received July 10, 1890, from 
F. M. Webster, Lafayette, Ind., two adult flies issued the next day. 
Elachiptera nigricornis Loew.—Adults of this species were also bred 
from the fall wheat plants referred to in the preceding paragraph. 
Elachiptera costata Loew.—This species was also bred from the above- 
mentioned plants of fall wheat. 
Three adults issued July 15, 1886, from plants of oats received on the 
2d of the same month. One specimen was received July 9, 1886, from 
W. 8B. Alwood, Columbus, Ohio, who also bred it from oats. 
Two adults were bred by the writer in McHenry County, Ill., from 
larve found in a decayed cavity in the roots of a living garden radish. 
On August 29, 1894, a melon root was received from M. P. Barnard, 
Kenneth Square, Pa.; the root was decayed in several places, and in 
the cavities were larve of this insect. The adults issued September 
14 and October 10 of the same year. 
Elachiptera nigriceps Loew.—Issued August 15, 1883, from pond-lily 
plants infested with the larve of Pyrausta penitalis which had bur- 
rowed into the stems and seed pods. The plants were collected at 
Washington, D. C., August 1. 
On August 24, 1883, Mr. A. Koebele found several larve of this insect 
at Washington, D. C., in a gall-like fungus growth on the stem of a 
water lily; three adults issued on the 12th of the following month. 
Adults were also reared August 25, 1886, from decaying water lily 
plants collected by Theo. Pergande at Washington, D. C. 
From plants of Panicum crusgalli received August 14, 1884, from F. 
M. Webster, Oxford, Ind., several adults issued on the 11th of the fol- 
lowing month. ; 
