430 Tachinidae. 



myia., frons in male rather broad and still broader in female, rather 

 protruding; cheeks broad to very broad, sometimes narrower; jowls 

 from half as broad to nearly as broad as the eye is high. No ocellar 

 bristles but inner and outer vertical and in male two to three, in 

 female three orbital bristles. Postocellar and occipital bristles distinct. 

 Frontal bristles descending a little below insertion of antennæ, about 

 three upper stronger, reclinate, and the iippermost directed out- 

 wards in both sexes. Cheeks sparingly hairy, with a coiiple of bristles 

 below near the eye-margin. Proboscis long and thin, longer than 

 oral cone, labella oval; palpi long and thin, thread-like. Antennæ 

 inserted at middle of the eye, second joint longer than third, the 

 latter longer than broad; arista short, thickened towards end but 

 evenly tapering, the basal joints elongated, of about equal length 

 or the first shorter. Thorax quadratic; three or four postsutural 

 dorsocentrals, and two or three præ- and three postsutural acrosti- 

 chals; a præsutural intraalar bristle. Scutellum with four to five 

 marginal bristles on each side, the apical crossing, and with some 

 bristles on the disc. Three sternopleural bristles. Abdomen shorter or 

 longer ovate; excavation on second segment reaching hind margin; 

 sternites quite or almost quite concealed; there are only marginal or 

 both discai and marginal bristles; second segment without bristles. 

 Fifth sternite long and arched, shining, more or less deeply cleft, bue 

 only at apex; the lamellæ shorter or longer and armed with a tooth 

 at apex or drawn out in a strong upwards curved spine. Male genitalia 

 as in Echinomyia suddenly smaller than fifth segment; upper forceps 

 reduced to a small, triangular piece, almost hidden; arms of lower 

 forceps small, placed at end of hypopygium, of semicircular or more 

 triangular outline, inwards going out in a spine or more or less spine- 

 shaped process, the two processes meeting in the middle. Legs as in 

 Echinomyia^ hind coxæ likewise with hairs behind, claws and pulvilli 

 elongated in male, and the three middle joints on front tarsi dilated 

 in female. Wings as in Echinomyia. 



As seen, the genus differs from Echinomyia especially by the 

 want of ocellar bristles, the presence of orbital bristles in both sexes, 

 the bristles on cheeks and the want of bristles on second abdominal 

 segment. Also is the hypopygium of another shape, and the abdominal 

 tergites quite or almost meeting below. 



The species are parasitic on Papilio and various Heterocera, 

 and they belong to PanteFs group 4. Like the species of Echinomyia 

 they are most frequent in sandy piaces. 



