71 
An adult wiis bred October 2t, 1SS7, by A. Koebclc, IVoiii a <j:5i|1 like 
swelling on the stem of I'Jli/tn us art'naritis coWecto.d ;i few days previ- 
ously neiir Alaniedji, Cal. 
Chlorops ln(p-((f(( Will. — On Auj^iisl 12, ISS4, several jdantsof Jl/?//t/6'n- 
bergia mexicana were received from F. M. Webster, Oxford, liid. At 
the tips of the plants were gall like swellings, each containing a larva or 
pupariuni of this insect. The adult Hies issued May 12, 15, and 21, 
and June 1, of the following year. 
Chlorops graminea Coq. — An adult of this species was bred by A. 
Koebele, June 12, 1888, from a gall-like swelling on an unknown grass 
collected in A})ril of that year at Lancaster, Cal. 
Chlorops asswiills Macq. — On July 20, 1884, Mr. Theo. Pergande found 
two larva> and one pupariuni of this insect among a colony of aphides 
on the roots of Foa pratensis. One of the flies issued on the 31st of the 
same month. 
On September 6, 1892, several sugar beets were received from the 
W. B. Sugar Company, of Castroville, Cal., and in the leaves were 
found a number of the puparia of this insect. The adult flies issued 
two days later. 
LarviiB and puparia of this species were taken September 1, 1897, by 
Messrs. F. H. Chittenden and F. C. Pratt in the earth about the roots 
of horse-radish in the vicinity of Tennallytown, D. C. Several adults 
issued a few days later. The larv?e and puparia were evidently attacked 
by one or more species of minute Staphylinidjc found with them in all 
stages, and some of the puparia gave forth the proctotrypid parasite 
Loxotropa californica Ashm. 
Genus Oaurax Loew. 
The two preceding genera belong to the group Ohloropinre, Avhilethe' 
present genus and the genera which follow belong to the Oscininse. 
The larvDB of the genus Gaurax differ in a marked degree in habits 
from the others in that they feed upon insect remains instead of vege- 
table matter. 
Gaurax anchora Loew. — A cluster of egg shells of Corydalus cornutus 
found Au'gust 24, 1895, by Mr. E. A. Schwarz, near Washington, D. C, 
was placed in a glass vial containing damp sand, and on the 3d of the 
following month a puj)arium of this Gaurax was found in the sand 5 the 
adult fly issued on the 12th of the same month. 
Four adults issued April 9, 189G, from cocoons of Orgyia leucostigmia 
collected in September of the preceding year; the larvae were observed 
to feed upon the cast-off skins of the caterpillars and upon the chrysa- 
lis shells. Another adult issued April 17, and one on the 18th, from 
the same lot of cocoons. Other adults were bred in May, July, August, 
and September, 1896, from larvai found in the cocoons of the above 
moth. 
