( <ay ) 
extremity of the ultimate segment of the dorsal region, which recess is still 
retained in the brown oval puparium, by a corresponding aperture at the 
posterior apex. ‘The Conops, moreover, essentially differs in habit, its 
transformatious being completed within the body of its victims. 
In the ‘First Report of the United States Entomological Commission’ 
(Washington, 1878, p. 323), these larvae, as distinguished from those of 
Tachina, are thus described :—‘* The Tachina larva is rounded posteriorly, 
with a small spiracular cavity, easily closed, and having a smooth rim; it 
contracts to a pupa, which is quite uniformly rounded at each end. The 
Sarcophaga larva is more truncate behind, with fleshy warts on the rim of 
the spiracular cavity, and with a more tapering head ; it contracts to a pupa, 
which is also truncate behind, and more tapering in front, where the pro- 
thoracic spiracles show as they never do in Tachina.” It will be readily 
observed that, in this instance, the larva of Sarcophaga lineata coincides 
rather with the former than with the latter. 
Several species of these Tachinids are adverted to in the same ‘ Report,’ 
describing the mode in which their eggs are firmly attached to those parts 
of the body not easily reached by the jaws and legs of their victims—under 
the wing or on the neck—when the locust jumps or flies; the young larve 
from these eggs eating their way into the body (/.c., p.319). The Sarcophage, 
however, from their “ well-known habit of breeding in dead and decomposing 
animal matter,” are considered to be ‘‘ most attracted to those locusts that 
are feeble or already dead, and are fond of laying their eggs on specimens 
that have just moulted, and are yet pale, soft, and helpless” (d. ¢., p. 323). 
The locusts forwarded by Mr. Calvert prove to be the Gidipoda cruciata 
of Charpentier, to which the specimen exhibited on a former occasion as 
bred in this country from the Troad eggs (Proc. p. xiv, aute) must be 
referred, no adults having then been received. From some of these sent 
alive, the internal larve effected their exit, and developed their pups in 
transit, several of the latter being found loose in the box; a small Chalcis* 
* Probably Chalcis minuta, L., or what is known on the Continent as 
C. femorata, Dalm. The synonymy is much involved, e.g., Walker says (Ent. Mag. 
ii. pp. 28—32) :— 
C. minuta, L. = C. femorata, Dalm. g. 
C. podagrica, Fabr. = C. femorata, Dalm. 92. 
C. minuta, Dalm. = C. parvula, Walk. 
C. femorata, Panz. = C. flavipes, Latr. (nec Fabr., Panz., Fonse.). 
An examination of the Walkerian types in the National Collection is not more 
satisfactory. Of our three specimens, which, from their economy, are presumably 
all one species:—(1), which has the left posterior femur black with yellow spot at 
apex, but the right femur ferruginous (extus totus rufus) with yellow spot at apex, 
corresponds with C. podagrica; (2), agrees with one specimen of C. minuta, but not 
with all; (3), which has a bright yellow spot on the dorsum of the terminal segments 
of abdomen, is not in the Collection, 
