DIPTERA. 209 
square colourless spot by its connewion with the other which extends near to 
the hind border; wing-ribs and veins black; tip cross-vein much bent, 
forming nearly a right angle ; lower cross-vein very slightly waving ; poisers 
pitchy. Length of the body 14 line; of the wings 3% lines. 
Psinopus Extmivus, Mas. 
Cyaneo-viridis purpureo varius, abdominis segmentorum suturis nigro- 
eneis, antennis nigris, pedibus piceis, tibiis anterioribus fulvis, alis 
subcinereis. 
Bright bluish green, beset with black bristles: front of the head and 
breast adorned with a white covering; crown purplish : eyes bright red : 
mouth tawny: feelers black ; siwth joint a little longer than the chest: chest 
indistinctly striped ; scutcheon purple : abdomen about twice the length of 
the chest, nearly cylindvical, slightly tapering to the tip, adorned with two 
purple bands; sutures of the segments and tip brassy black ; appendages 
tawny: legs pitechy, coyered with black down, beset with a few black 
bristles ; tips of the thighs and four front shanks tawny : wings very slightly 
grayish ; wing-ribs and poisers tawny; veins black, tawny at the base; 
tip cross-vein forming a slightly obtuse angle ; lower cross-vein with two deep 
curves. Length of the body 4 lines; of the wings 8 lines. 
New Holland. 
PsiLopus veNnustus, Mas. 
Aureo-viridis, abdomine basi subtusque fulvo, antennis basi pedibusque 
fulvis, femoribus flavis, alis subcinereis. 
Golden green, adorned with a white bloom, beset with black bristles : 
eyes bright red, with a crimson tinge: mouth tawny: first and second joints 
of the feelers tawny, beset with short black bristles: abdomen tapering, 
clothed on each side of the base with white hairs, narrower than the chest 
and near twice its length, tawny at the base and beneath, coppery and cylin- 
drical towards the tip: legs tawny, beset with few black bristles, clothed 
with very short black hairs, which as in the following species of this genus 
and of Dolichopus, form parallel rows: thighs yellow: wings very pale 
gray ; tip of the fore border and cross-veins slightly clouded with darker 
colour ; wing-ribs and poisers tawny; veins black, tawny towards the 
7 ee [ -_ 
