Nemoraea. 423 



epistoma more grey; jowls grej; frontal stripe dark or blackish 

 brown. Orbits with black liairs, and jowls black-haired, with a row 

 of bristles at the inner margin. Occiput yellowish or yellowish grey, 

 with yellowish hairs. Eyes with brownish yellow hairs. Antennæ red 

 or with the third joint more or less to quite black, it is narrow, a 

 little dilated outwards, rounded at apex; arista longer than antennæ, 

 thickened only in a somewhat short basal part, and tapering evenly 

 and very fmely. Palpi somewhat dilated, yellow, with dense black 

 hairs and bristles. Thorax blackish, not or slightly shining, fmely 

 bluish grey pruinose, palest on humeri and at the sides; there are 

 four somewhat narrow, dark stripes, the median diverging, abbreviated 

 behind, the lateral interrupted at the suture; scutellum brownish 

 red all over or on apical part. Thorax has short black hairs. Abdomen 

 somewhat shining yellowish or brownish red, with base and a middle 

 line black; fifth segment may be more or less to quite black; abdomen 

 is more or less whitish or whitish yellow pruinose on a broader or nar- 

 rower front part of the segments; it is black-haired; second segment 

 without bristles, third with a pair and fourth with a row of marginal 

 bristles; fiftli segment with two rows. Genitalia not large, rather 

 hidden on ventral side; præhypopygial segment not shining, somewhat 

 long, with bristles; hypopygium small, also with some bristles. Upper 

 forceps deeply incised at base and drawn out in two long, thin, up- 

 wards curved lobes with long hairs at end; the lobes form a right 

 angle with the anterior part, which latter is triangular and pointed, 

 with small spines on ventral side margins and at apex a small hook; 

 arms of lower forceps somewhat broad at base and directed forwards, 

 then curved rectangularly downwards as a thin, rod-like arm. Legs 

 black, femora with long bristles below. Wmgs yellow on nearly basal 

 half, outwards clear; veins yellow, brownish outwards. Squamulæ 

 yellow, thoracai squamulæ haired above. Halteres yellow. 



Female. Rather different in aspect as abdomen is quite black, 

 and it is easily taken for another species. Frons about as broad as 

 the eye; generally three orbital bristles. Face more whitish than in 

 male. 



Length 11 — 15 mm. 



N. pellucida is not rare in Denmark; Dyrehaven, Geel Skov, 

 Grib Skov, Tisvilde, Jægerspris, Faxe Ladeplads, Køge; on Lange- 

 land at Lohals; on Lolland at Bremersvold and Strandby and in Jut- 

 land at Sottrup, Høruphav, Mj eismark and Laven and Tollund near 

 Silkeborg; the dates are ^^/s — ^/g. The species occurs on leaves of 



