22 E. B. WlIJ.IAMSON 



Triacanthagyna caribbea, new species 

 6, 10, II, all in part. See text. 



Abdomen male 41-45. female 44-47; hind wing male 39-45, female 42-46; 

 superior appendage male 5.4-57, female 6.9; stigma front wing 3.5-4.2. 



Male. — Living colors, from notes on the I'alma Sola male, March 6, 

 1920. (Descriptive notes in parentheses made from preserved specimens.) 

 \^ery much like T. ditzleri; head above darker green, the black line, border- 

 ing the blue bar across the eyes, is itself narrowly bordered above with light 

 green, and the blue bar itself below passes through darker blue to black ; 

 rear of head with very nearly white replacing the greenish yellow. 



Prothorax almost white, posterior lobe darker. 



Thorax less brilliant green but still very bright; dark markings reddish 

 brown, less contrasted with the green as compared with T. ditdcri, but still 

 very distinct, the dorsal dark area more widely connected with ante- 

 humeral stripe, thus more isolating the dorsal green. 



Abdomen brown, much paler than in T. ditzlcri; on 2 PL is large, quad- 

 rangular, twice as wide as PD above it, and joined with the auricle, not so 

 joined in T. ditdcri; (three denticles or three and the vestige of a fourth on 

 each auricle ; one to nine, usually four to six, small teeth of varying sizes on 

 the margin of the genital fossa on the prominence opposite the posterior 

 end of the ligula) ; on 3 AL larger, reaching the transverse carina; 3-8 with 

 ML present as small pale yellowish brown spots ; MD and PD still con- 

 spicuous on 7 ; on 8 as conspicuous as on 7 in T. ditzleri; PD represented on 

 9 by small spots. 



(Wings hyaline "to brownish tinged, costa dark reddish brown to almost 

 black at apex, stigma reddish brown, beneath lighter yellowish brown, vena- 

 tion black or nearly so.) 



(First and second femora black or nearly so, paler at base and green 

 behind, the two similar in color, thus ditTerent from dkslcri where the second 

 and third legs are similarly colored ; third femora black, or nearly so, thus 

 distinctly darker than in T. ditdcri; tibiae black beneath, reddish brown 

 above; tarsi black.) 



A teneral male, Santa Marta, December 14, 1916. in life was colored as 

 follows : Eyes above dark brown. Dorsum of thorax bright brown, stripes 

 bright green and distinct; sides green with brown markings in definite 

 pattern. Abdomen brown, markings black (at the extreme apex of each 

 segment from 3 posteriorly to about 7), and (spotted) obscure yellow. (In 

 this specimen the third femora are dark brown and the contrast between 

 the second and third femora is as well marked as in adults.) 



The following notes on living colors were made on an apparently adult 

 male, Bolivar, Colombia, December 21, 1916: Colors of thorax bright green 

 and rich brown in distinct and sharp pattern. Abdomen browMi with green 

 and black markings. 



Female. — Based on preserved material. Face light yellowish brown, 

 darker above, with only faint traces of green ; frons above dark dull green 

 shading into black anteriorly, with the stem of the T-spot obscure or want- 

 ing, as in the male. 



