FOUR NEW CULICID-aS. 547 



Culex argentinotus, sp. nov. 



9 , length -1.5 millimeters, length of wing 3.5 millimeters, length of 

 proboscis 2 millimeters, general color of mesonotum red-brown, of abdo- 

 men dark brown, scutellum entirely covered with silver-white scales giving 

 the appearance of .a transverse silver line. 



Head with dark gre}^ scales above, flat, pale ocher scales beneath; very 

 long, upright, dark, forked scales over entire occiput; three long, incurv- 

 ing bristles on each side of front over eyes which are nearly black. 

 Antennffi pale brown, first segment ocher; segmental bristles dark brown 

 proximad to white distad. Palpi pale brown, one-sixth the length of 

 proboscis which is also pale brown, except ajiical sixth which is darker 

 brown. 



Prothoracic lobes pale brown with narrow, golden scales; mesonotum 

 with fine, red-brown and golden scales; pleurse pale; dorsal areas of 

 epimera and episterna with small patches of white scales ; golden recurved 

 scales ventrad to base of wing. Scutellum clothed Math silver-white scales 

 which foi'm a complete transverse band, and numerous very long, brown 

 bristles from posterior margin. 



Abdominal segments dark brown apically, paler basally with white hairs 

 on posterior margins of all except first which is clothed with erect, white 

 hairs among fiat scales; ventral surface pale ocher. 



Halteres very pale, stem and knob concolorous. 



Pemora externally dark brown, internally nearly white, paler basally 

 than apically, extreme apices with silver scales which overlap the articula- 

 tion ; tibife with dark brown scales, as also all tarsi. 



Ungues of fore and mid tarsi equal and with large basal teetli; those 

 of posterior tarsi small, equal and simple. 



Wings sparsely clad toward apex with short median and very long, 

 narrow lateral scales noticeable especially on veins II, III, IV and V; 

 supernumerary and mid cross veins in nearly same line; posterior cross 

 vein removed by 1-|- times its own length. Lateral fringed scales increas- 

 ing noticeably in length from vein VI to base of w'^^o's. 



S, length 4.5 millimeters, length of wing 3 millimeters, length of 

 proboscis 1.75 millimeters ; similar to 9 in color and markings, including 

 the scutellar silver band. Palpi slightly longer than proboscis, seal 

 brown, lecurved as in C microannulatus Theob. ; articulations not pale. 

 The occiput clothed with flat, pale ocher scales, dark grey at the nape. 

 Upright, forked scales as in 2 . The seventh abdominal segment in the 

 type specimen is apparently strongly lobed caudolaterally, and the gen- 

 italia are different from those of any of the Culicidss heretofore observed 

 by me. The harpes are unlike those of any species that I have examined 

 previously. The eighth segment is truncately obeonical. 



The wing veins are almost destitute of long, narrow lateral scales, these 



