504 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io5 



dorsal margin curving slightly posteroventrally, ventral margin 

 rounded, one posterior articulation ridge; tenth tergite shorter 

 medially. 



Holotype: a female (pinned) from the Orinoco River, Barrancas, 

 Venezuela, Feb. 13-16 (N. A. Weber); MCZ. 



Weber collected at Barrancas near the mouth of the Orinoco River 

 at the head of the delta, inland from the lagoon west of the village in 

 January and February 1935 (Bol. Ent. Venezolana, vol. 6, pp. 143- 

 160, 1947). 



The holotype has the right forewing, apex of left forewing, left 

 metathoracic legs, and tips of the antennae missing (there being 45 

 segments remaining in left antenna and 44 segments in right). The 

 left pair of wings is mounted in balsam on a slide, and the abdomen 

 is in a vial containing glycerin pinned beneath the holotype. 



The male is unlaiown. 



The forewing of nota resembles closely that of basalis from the 

 neighboring country of British Guiana. It has the shortest radio- 

 medial streak of those species possessing one, and can be distinguished 

 from basalis on this basis as well as because of the absence of anal 

 streaking, comparative scarcity of intervenational streaking, and 

 broader lateroventral halves of the ninth tergite of the female. The 

 constancy of the position of 2d m dhectly below 1st r-m, and 3d m 

 directly below 2d r-m will not be known until further collections of 

 this species are made. 



Climacia basalis Banks 



Figure 23, a; Plate 2, figure 8 



Climacia basalis Banks, 1913, p. 138 (British Guiana). — Navds 1933, p. 196, fig. 



43; 1935, p. 37, fig. 19. 



Female: Head with vertex yellowish brown, shining; face yellowish, 

 sometimes with reddish suffusion; palpi yellow; antennae with basal 

 two segments yellowish brown, the following 30 (approximately) 

 darker brown, the next 30 (approximately) yellowish to light brown 

 with the transitions being gradual (of about 62 segments) ; legs yellow; 

 pronotum yellowish dorsally, sometimes with a thin black median 

 streak and other irregular streaking, mesonotum and metanotum 

 yellowish, mesonotum sometimes with narrow black median streak, 

 mesothoracic and metathoracic pleura with broad yellowish brown 

 dorsoventral streaks, particularly anteriorly; abdomen yellow (with 

 transverse blackish bands dorsally in pinned specimens). 



Forewing (pi. 2, fig. 8) : Average length 4.5 mm., average width 

 1.8 mm.; membrane faintly tinted with yellow and with two brownish 

 black areas; the first more prominent, the radiomedial streak, elongate, 

 crescent-shaped, beginning slightly proximal to Rs+MA, but a little 

 posterior to forking of Rs+MA from Rl, then weakly curving and 

 extending along Rs+MA and MA to about 1st m, from where it cmwes 



