18 DIPTERA. 
this species, or perhaps to H. abrupta ; it has, however, the coloration of the abdomen 
and the legs more obscure. | 
12. Hystricia pyrrhaspis. 
Tachina pyrrhaspis, Wiedem. Aussereur. zweifl. Ins. ii. p. 807. 477. 
Hystricia pyrrhaspis, Schiner, Reise d. Novara, Zool. iii., Dipt. p. 332. 1227. 
Hab. Mexico, Cordova (Hége); Guatemata, Las Mercedes 3000 feet, San Gersnimo, 
Cubilguitz, Lanquin (Champion).—Souta America 2, Brazil }. 
Several male specimens. 
I believe I correctly refer these Central-American examples to Tachina pyrrhaspis, 
Wiedem.; though the specimens are larger (14-19 millim. ; Wiedemann gives 6 lines), 
they agree very well with the description. 
The species is closely allied to the preceding; the third joint of the antenne is 
still more obscure in colour; the abdomen has no dorsal spots nor a dorsal band, 
but the fourth segment and also more or less the hind margin of the third are black 
and with black pile. 
H. abrupta, H. dorsalis, and H. pyrrhaspis form together a group which is chacter- 
ized by the fulvous coloration of the body and the slenderness of the third antennal 
joint. Tachina anthemon and T. amisias, Walk. (List Dipt. Brit. Mus. iv. pp. 733, 734) 
—the first from Brazil, the other without indication of locality—belong to Hystricia, 
and apparently to this same group. 
13. Hystricia ——. 
Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
A single specimen (@ ), too imperfect to describe. It bears a striking resemblance 
to the variety of Dejeania pallipes, Macq., with brown-coloured front femora; but on 
account of the non-elongated palpi and of the hairy eyes it must be included in the genus 
Hystricia. 
SAUNDERSIA. 
Saundersia, Schiner, Reise d. Novara, Zool. iii., Dipt. p. 333 (1868). 
In its principal characters this genus agrees with Dejeania and Hystricia ; but the 
palpi are very small, rudimentary, or even totally absent; the eyes are bare; and in 
most of the species the arista is a little pubescent, which, however, is only perceptible 
under a strong lens. 
On account of the rudimentary palpi, some of the species belonging here were 
formerly placed in the genus Micropalpus, Macq., from which they differ in their 
Echinomyia-like facies and in the strong spines on the scutellum and abdomen. 
