DIPTERA. 293 
Of the species which always present these characters, we will 
distinguish those whose epistoma does not project in the manner of 
a rostrum, and the sides of whose head are not prolonged in the form 
of horns. . 
In some, the seta of the antenne is simple or without any very 
apparent hairs. 
In one single subgenus 
Ecuinomyia, Dum.—Tachina, Fab. Meig. 
The second joint of the antennz is the longest of all. The last or 
the palette is widest, compressed, almost in the form of a reversed 
triangle or trapezoidal. The seta is biarticulated inferiorly. 
E. grossa; Musca grossa, L.; De Geer, Insect., VI, 1, 12. 
The largest species known, and almost of the size of a Bombus; 
black, bristled with thick hairs; head yellows eyes brown; origin 
of the wings russet. It hums loudly while on the wing, alights 
on flowers, in the woods, and frequently on cow-dung. 
The larva lives in the latter substance; its body is yellowish, 
glossy and conical, furnished with a single hook and two small 
fleshy horns at its anterior extremity or the point; the opposite 
end is terminated by a circular plane on which are two stigmata, 
each formed of a lenticular and brown plate raised in the middle. 
The second annulus of the body, the head counted as one, also 
presents a stigma oneach side. The posterior extremity of the 
cocoon of the pupa, which is also conical, presents two more 
distinct stigmata; its contour is formed by a nine-sided lamina. 
See Reaum., Insect., IV, xii, 11, 12; and XXVI, 6—10(1). 
In the other Creophilz, the third joint of the antennz is longer 
than the preceding one, or at least is never shorter. 
Sometimes the anterior face of the head is almost smooth, or pre- 
sents but very short hairs, arranged as usual in two longitudinal 
rows, none of which are much larger than the others. 
shorter; the longitudinal nervures which form the sides, are prolonged to the pos- 
terior margin, thereby fofming another cell, which becomes terminal and incom- 
plete. In the Creophilz, the two nervures are not (or but very slightly) prolonged 
beyond the closed cell. 
(1) Division A of the genus Tachina, Meig. The species called ferox has its 
palpi dilated in the form of a spatula, and constitutes the genus Fabricia of M. 
Robineau. The Stomoxys bombilans, Fab., has the facies of the Echinomyiz, and 
the proboscis of the Bucentes. 
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