372 
reared the last week in May and the first week in June from the cocoons 
received from Mr. Maxwell. Two specimens of Chelonus electus Cr. (Fig. 
31) were reared on the 6th and 8th of June from the same lot of cocoons 
and a single specimen of Limneria melanocoxra Ashm. was reared on 
the 22d of May. The smooth, shining, semitransparent cocoons of 
the Cremnops are found occupy- 
ing the rear portion of the long 
cocoon tube of the web-worm. 
Their location is indicated at Fig. 
45), p. 321, vol. Vv, INSECT LIFE. 
Of the smaller, tougher, dark- 
brown cocoons of the Meteorus 
three or four may be found in a 
single case of the web-worm. We 
are unable to identify the cocoons 
from which the Chelonus and 
Limneria issued. 
In addition to these hymen- 
opterous parasites two Diptera 
have been reared. They have 
Fic. 31.—Chelonus electus: female—greatly en- been named by Mr. Coquillett. 
larged (original). LN The first is a single specimen 
of Sarcophaga helicis Towns. (See 
Psyche, Feb., 1892, p. 220), the type of which was reared by Mr. H. A. 
Surface from a living snail. The caseof the Sugar-beet Web-worm, from 
which this fly emerged, was fortunately found. The anterior portion 
was occupied by the puparium of the fly and the posterior portion by the 
dry and shriveled skin of the web-worm larva. This was one of the 
cocoons sent tous by Mr. Maxwell in May, 1893. The Sareophaga 
emerged on the 5th of June following. The second Dipteron is Phorbia 
Suscipes Zett. Thisis the species which wasfound abundantly during the 
outbreak of the Rocky Mountain Locust to feed upon the eggs of the 
locust, and was described by Prof. Riley as Anthomyia radicum var. 
caloptent. Mr. Coquillett also informs me, after an examination of 
Fitch’s type of Hylemyia deceptiva now in the collection of the U. S. 
National Museum, that this insect, called by Fitch “the Deceptive 
Wheat-fly,” is also identical with this species. The species has also 
been reared by Prof. Riley from cabbage and radish roots. The para- 
sitism of the species on the web-worm larva is very doubtful, and it is 
more likely that the Phorbia larva, from which this fly was reared, fed 
upon the beet root and perhaps crawled into the larval case of the web- 
worm for pupation. In view, however, of the well-known locust-egg- 
feeding habits of this species the fact is well worth mentioning here. 
Of the hymenopterous parasites above mentioned the Cremnops, the 
Limneria, and the Chelonus have, so far as I know, never before been 
reared. 
