Triacaxthagvxa and Gynacantha 



29 



Moreover ^Martin's description of the female appendages as "exlremement 

 longs" is hardly applicable, and there is the absence, in the description of 

 the male, of the broad mid-lateral brown thoracic stripe, so I am inclined to 

 believe more than one species is included under tenuis in the de Selys 

 Collection. 



The wings are hyaline to lightly brown tinged. In the male the margins 

 of the genital fossa on abdominal segment 2. anterior to the point of con- 

 vergence, have on either side from none to thirteen small scale-like teeth. 

 When these teeth are present in numbers they are in a single irregular row. 

 Posterior to the point of convergence there are none to two similar teeth. 

 The auricles on the same segment are each armed with five to nine denticles. 

 The abdominal appendage of the female is linear widening very slightly 

 from the base to about five-sixth the length from which point it tapers 

 symmetrically to the acute apex ; maximum width .36-. 4. 



The following color notes were made from the freshly killed Tachira 

 male. Eyes above dark green, shading below into paler green and grayish 

 with black pseudopupillae. Prothorax pale flesh brown, hind lobe brown. 

 Mesepisternum with inner half green, outer half brown, a rich brown meso- 

 thoracic collar, continuous with narrow middorsal brown, this collar nar- 

 rowly bordered in front with green ; mesepimeron, metepisternum and 

 metepimeron green ; a dark brown, almost black stripe between the mese- 

 pimeron and metepisternum, and a brown stripe between the metepisternum 

 and metepimeron. Three anterior interalar sclerites on each side and those 

 between these, green or greenish ; the others blue. Abdominal segment 

 I brown, pale basally, darker apically ; 2 brown above, a longitudinal mid- 

 dorsal green stripe wider basally and at midlength, and passing apically into 

 a wide transverse trilobed blue band, on either side a basal spot and a median 

 triangular spot, green; 3 and 4 with MD present, small and green; 3 with 

 PD present and blue ; 3-8 with ML present, greenish or yellowish ; AL 

 present on 3. blue, reaching the transverse carina ; 8-9 with a dorsal median 

 yellowish spot on either side. 



The following notes were made on the living colors of the female taken 

 at Cristalina. Eyes dark green, almost brown above, paler to greenish gray 

 beneath. Dorsum of thorax green, divided in the middorsal line and 

 bordered below with brown ; the dorsal green fades out behind into a 

 wide brown antehumeral stripe ; behind this, on the mesepimeron, is a pale 

 greenish stripe three-fourths as wide as the antehumeral brown stripe ; 

 behind the green stripe is a very distinct dark brown stripe one-third as 

 wide as the pale stripe anterior to it. Abdomen brown, green and Diack: 

 markings small, not evident on 7-10. 



.\s we observed tenuis at La Fria it was on the wing through the day. 

 It frequented dense forests and was usually found hunting about, with 

 apparently relatively weak flight and much poising, in knee-high vegetation, 

 usually of rather thick growth. In such locations it frequently alighted on 

 vertical stems within a few inches of the ground. In the same forest we"* 

 found Triaconthagyna ditcleri and Gynacantha tibiata, gracilis and vieni- 

 branalis. Thinking there might be some twilight fliers, we waited one 



