Nemorilla. 325 



Male. Frons above broad, broader than the eye, somewhat 

 protruding; cheeks broad and jowls more than half as broad as the 

 eye is high. Orbits and cheeks yellowish grey, the former darkened 

 above; jowls likewise yellowish grey; frontal stripe brownish. Orbits 

 and jowls black-hairy. Occiput yellowish grey, with yellowish hairs; 

 behind postocular bristles a row of black hairs. Eyes with yellow 

 hairs. Antennæ brownish black, basal joints yellow; second joint 

 short, third about six times as long; arista long, thickened in less 

 than basal half. Palpi yellow. Thorax blackish, greyish yellow prui- 

 nose, palest at the sides, with four black stripes, two narrow median, 

 diverging and abbreviated behind, and two lateral, interrupted at 

 the suture; sciitellum reddish yellow. Thorax black-haired. Scu- 

 tellum with three marginal bristles on each side, and a pair of very 

 small Crossing apical hairs. Abdomen all yellowish pruinose, shifting 

 a little with brownish according to view; it has somewhat long black 

 hairs, and discai and marginal bristles, second segment with a pair 

 of marginal, third with a pair of discai and one or two pairs of marginal 

 and foiirth with a pair of discai and a row of marginal bristles. Fifth 

 sternite cleft to the base. Genitalia forming a small knob. Legs yellow. 

 Wings slightly tinged, yellowish at base; veins yellowish brown; 

 discai angle a little obtuse; apical cross-vein slightly concave; pos- 

 terior cross-vein doubly curved. Squamulæ and balteres yellowish. 



Female. Similar; frons much broader than the eye; antennæ 

 paler. Abdomen more greyish. 



Length. About 8 mm. 



P. vetula is rare in Denmark, only two specimens are known, 

 a male and a female, taken many years ago at Sorø. 



Geographical distribution: — Europe down into Italy; if pallipes 

 Fall. really belongs here it goes to southern Sweden. 



66. Nemorilla Rond. 



Somewhat small to medium sized species, of black colour with 

 greyish or yellowish pruinosity, in most respects similar to Exorista. 

 Frons slightly protruding. Jowls narrow. In both sexes ocellar and 

 inner and outer vertical bristles, the latter somewhat small in male; 

 in female two orbitals, No black hairs. behind postocular bristles. 

 Frontal bristles descending to insertion of arista, all crossing in male, 

 three upper reclinate in female. Cheeks bare. Vibrissæ slightly ascend- 

 ing. Antennæ inserted above middle of the eye, third joint as long 



