URACIS.—THOLYMIS. 219 
long time to obtain the intermediate age conditions. See, however, the remarks under 
fastigiata, posted. 
2. Uracis fastigiata. (Tab. IX. figg. 7, 8.) 
Libellula fastigiata, Burmeister, Handb. Ent. ii. p. 850 (1839) *; Calvert, Trans. Amer. Ent. Soc. 
XXv. p. 64 (1898). 
Uracis fastigiata, Hagen, Syn. Neur. N. Amer. p. 186 (1861) °*. 
3. Burmeister’s type? has the brown at the tip of the wings extending proximad to the proximal end of the 
stigma. From this condition, represented by two of the Brazilian males before me, a gradual increase in 
the extent of the brown may be traced, through the examples from Brazil, Peru, Nicaragua, Guatemala, 
Honduras, and Don Diego, to the maximum attained by those from Bugaba and‘ Chiriqui. These last 
have the brown reaching from the apex to the second or third postcubital on the front margin, thence 
obliquely inward (proximad) to the hind margin at the level of the triangle (hind wing), or not quite so 
far (front wing). It would appear that both north and south of Chiriqui the extent of the brown is less. 
The greater extent of brown is accompanied by an increase in the length and width of the wings, but the 
correlation is not exact, as these figures show :— 
Brazil, 3 ¢. Hind wing: length 33°5-34, maximum width 10-10°5 mm. 
Nicaragua,3 3. ” » 15-33, » 10-10°5 _,, 
Bugaba, 9 ¢. » » 33-387, ” 10-11 ” 
Thoracic dorsum finely transversely striated with pale and dark brown, becoming dark blue pruinose with age, 
as is clearly shown by the series from Bugaba. The intensity, but not the extent, of the brown on the 
wings, and a darkening of the abdomen until it becomes unicolorous, increase step by step with this 
change on the thorax. 
Q (hitherto undescribed), All the examples are young, have the thoracic dorsum finely transversely striated 
with pale and dark brown, the abdomen coloured as in the young males, maximum extent of the brown 
at the apex of the wings in the Iquitos individual, where the last postcubital is the proximal limit. 
A Brazilian example and the single one from Chiriqui, both immature, have the brown very faint, 
attaining only the distal end of the stigma. 
Hab. Mexico?; Guaremata[1 ¢]; Honpuras, Truxillo [C. H. Townsend: 1 3}; 
Nicaraaua [38 ¢ | (U.S. N. M.); Panama, Chiriqui (colls. McLachlan, P. P.C. ex 
coll. R. Martin: 4 3,1 2), Volcan de Chiriqui below 4000 feet |1 ¢ ], Bugaba 800- 
1500 feet [9 s | (Champion).—CotomBta, Don Diego in Dept. Magdalena (H. H. Smith, 
Carn. Mus. Pittsh.: 1 3); Perv (coll. P. P. C. ex coll. R. Martin; 1 3,1 2), Iquitos 
[1 9]; Braziu [Thorey, 1865, &.: 33,3 9] (MC. Z), Bahia? ?. 
Dr. F. Ris first called my attention to the close relation of the Chiriqui forms to 
fastigiata. | 
| THOLYMIS. 
Tholymis, Hagen, Stett. ent. Zeit. xxviii. p. 221 (1867); Brauer, Verh. zool.-bot. Ges. Wien, 
xviii. pp. 365, 712 (1868)*; Kirby, Trans. Zool. Soc. Lond. xii. pp. 258, 265 (1889) °; Cat. 
Odon. p. 1 (1890) *; Kriiger, Stett. ent. Zeit. Ixiii. p. 75 (1902) °. 
A circumtropical genus of two species, according to the latest writer® on the Old- 
World form. 
