502 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105 



in brownish areas and pale in pale areas in general; venation 

 similar to striata except 3d r close to 2d r before level of junction 

 of Sc and Rl, with cell 2d Rl between 2d r and 3d r not more than three 

 times as long as wide; 1st r-m slightly distad of 2d m in inner series, 

 3d m between MA and MPl+2 considerably basad of 2d r-m, almost 

 directly under 3d r; Cul with five branches to margin in right wing 

 and six in left; three inner gradates in regular series, five outer 

 gradates in irregular series. 



Hind WING (pi. 2, fig. 4): Length 4.4 mm., width 1.8 mm.; color 

 pattern similar to that of forewing but membrane lighter brown; 

 hyaline area in pterostigma very narrow, narrower than in striata; 

 T between R2 + 3 and R4 + 5 distad of 2d r, the outer gradates in 

 irregular series. 



Female genitalia (fig. 20, a): Eighth tergite shortest dorsally, 

 lengthening considerably to below spiracle where it shortens again; 

 ninth tergite with each lateroventral half large, elongate, with one 

 thick posterior articulation ridge, anterior margin irregular, slightly 

 over one-half of length, dorsal margin concave, ventral margin 

 slightly curved ; tenth tergite shorter mediodorsally. 



Holotype: a female (in alcohol) from Honduras, 12 kilometers 

 west of Olanchito, June 20, 1949 (E. C. Becker); INHS. 



The holotype has the antennae broken at the apices (18 segments 

 remaining in the left antenna). The abdomen is in a small alcohol- 

 filled vial. 



This is the second species of Climacia taken in Central America 

 thus far, the first being striata. C. tenebra has the darkest wings of 

 the species of Climacia examined. It is similar to striata in general 

 coloration and venation, but differs in the forewing in the closeness 

 of 2d r to 3d r; the basal position of 1st r-m to 2d m between MA and 

 MPl + 2, the more narrow pale area in the pterostigma, the termina- 

 tion of the oblique hyaline streak at Cul, the more extensive brownish 

 color of the membrane, coupled with the lack of a basal clear area 

 and a less streaked appearance around the radiomedial streak, and 

 the color of the vertex and antennae. In the hindwing, the basal 

 costal blackish brown spot is less pronounced in tenebra. C. tenebra 

 resembles californica in the forewing in the closeness of 2d r to 3d r, 

 but is separated on the basis of the more narrow pale area in the 

 pterostigmal streak, more extensive brownish color of the membrane 

 in the forewing, and in the less pronounced radiomedial streak in the 

 hindwing. The yellowish vertex and face and the slightly longer, 

 less rounded ventrally, more concave anteriorly lateroventral halves 

 of the ninth tergite of the female also distinguish tenebra from 

 californica. 



