46 E. B. Wir.i.iAMS0N 



specimens from the two localities. At the same time the differences in 

 complexity of venation, the coloring of the wings and the size offer no 

 specific characters and I have been unable to detect others. 



Gynacantha interioris, new species 



Abdomen male 54-56, female 54-57; hind wing male 51-52, female 54-56; 

 superior appendage male 7.2-8.1, female 7.5; stigma front wing 5.4-6.3. 



Male and female. — Labium and face pale yellowish bro^vvn ; more or less 

 darker above ; f rons above and frontal vesicle black, a pale brown median 

 transverse bar on either side of the frons which thus, with its fellow of the 

 opposite side, defines a large conspicuous T-spot ; occiput greenish yellow ; 

 rear of head light brown or yellowish brown, above narrowly shining black 

 adjacent to the eyes with a brown or black bar to the foramen. 



Prothorax light brown, the middle and hind lobes indefinitely shaded 

 with brown, the front lobe almost white. 



Thorax brown, darker to almost black with or without greenish re- 

 flections on the middorsum. ; metastigma surrounded with black, a small 

 brown spot above it, another brown spot on the mesepimeron at the upper 

 end of the second lateral suture, and a more or less distinct spot posteriorly 

 on the latero-ventral carina. 



Abdomen brown ; i with a subapical dorsal transverse blue bar, bordered 

 behind and below with black; 2 with AD the length of the segment, ana 

 MD and PD present, apparently all blue in life, sides obscure brown, bright 

 colors not evident in dried material, in the male a brown spot just above the 

 auricle near its middle, a round spot posterior to this a distance slightly more 

 than the diameter of the anterior spot, a brown area below this posterior 

 spot in the angle of the auricle, and a brow'n spot near the ventro-anterior 

 margin of the segment ; auricle blue above, black edged, armed with five 

 to eight denticles; the ventral margin of the genital fossa, anterior to the 

 point of convergence, armed with a single row of eleven to thirteen scale- 

 like teeth; 1-8 narrowly black ringed at apex; 3-8 with MD and probably 

 ML present on all, and 3-7 apparently with AL, ML and PL present on each, 

 ML especially large and distinct; in life these spots are probably greenish 

 yellow or, in the case of the lateral spots, yellowish ; lateral carina black 

 on 4-7 ; appendages brown or black. Appendages of female, narrow at base, 

 slightly more than the apical half expanded, suggesting a modified male ap- 

 pendage of this group, expanded portion with a dorsal median longitudinal 

 carina or low keel ; maximum width .8-.9 ; apex tapering, acute. 



Wings hyaline to brownish tinged, with a longitudinal dark stripe, 

 especially conspicuous in the hyaline wings. Costa light yellowish brown ; 

 the stigma the same color, darker above, the enclosing end and posterior 

 veins black ; venation black or nearly so. 



First femur dark brown, shading to black at apex, a broad pale stripe 

 behind ; second and third femora pale reddish yellow ; tibiae and tarsi pale 

 yellow, paler than the second and third femora, the tarsi dark to black at 

 the apex adjacent to the dark reddish brown tarsal claws. 



