264 
A Monograph of Culicidae. 
2. Psorophora Holmbergii. Arribalzaga (1891). 
(Rev. (1. Museo cl. 1. Plata, Dipt. Arg. p. 40 (1891).) 
(Fig. 38, PI. X.) 
Of a general blackish appearance. 
Thorax shiny black, with a central line of small golden 
scales and with silvery scales on each side, back part of meso- 
thorax with a few scattered white and golden lateral scales. 
Abdomen deep dusky brown, almost black, with dark yellowish- 
brown scales dorsallv, whitish below. Legs dark, clothed with 
long and short black scales, bases of tibiae and tarsi paler, 
testaceous. Wings dusky black, with deep brown scales. 
$ . Head deep testaceous behind, black in front, covered 
with white scales, with a tuft of golden hairs directed forwards 
in front and a few black bristles. Eyes coppery red. Antennae 
dark brown, with basal joints deep testaceous. Proboscis 
testaceous, covered with black scales which are particularly thick 
at the tip and long at the base. Palpi testaceous, long, covered 
with black scales, especially at the tips. 
Prothoracic lobes testaceous with black hairs. Thorax shiny 
black, with a central line of golden scales and with silver scales 
on each side of the thorax, back part of the dorsum with 
scattered central white and a few golden lateral scales, scutellum 
dark testaceous with white scales, bristles golden in some lights, 
black in others. Pleurae with scattered grey scales. Abdomen 
dusky, with yellowish-brown scales dorsally, w T hite scales beneath 
and with black hairs. Coxae and femora testaceous, the latter 
densely clothed with long black scales at the tip, especially in 
the mid and hind legs ; tibiae and tarsi of the fore legs testaceous 
w T ith black scales tibiae of the mid and hind legs with the scales 
long, but bare and pale testaceous at the base forming a pale 
band ; tarsi of mid legs with small black scales, the metatarsus 
and first tarsal joint pale at the base ; in the hind legs the tarsi, 
especially the metatarsal joint, densely black scaled, with a basal 
ring of pale testaceous and also a pale ring on the second and 
third joints. 
Wings dusky black, with metallic reflections and with thin 
dark brown scales. First sub-marginal cell very slightly longer 
and a little narrower than the second posterior cel 1; posterior 
eross-vein close to the mid cross-vein. Wings testaceous at the 
