218 NEUROPTERA. 
1. Uracis imbuta. (Tab. IX. fig. 6.) 
Lnbellula imbuta, Burmeister, Handb. Ent. ii. p. 850 (1839)'; Calvert, Trans. Amer. Ent. Soc. xxv. 
p. 64 (1898) ”. . 
Uracis imbuta, Hagen, Proc. Bost. Soc. Nat. Hist. xviii. p. 94 (1875) °; Carpenter, Journ. Inst. 
Jamaica, ii. p. 260 (1896) *; Kirby, Ann. & Mag. Nat. Hist. (6) xix. p. 604 (1897) °. 
Uracis quadra, Ramb. Névr. p. 31, t. 2. figg. 5e, e (entire 2, vulv. lam.) (1842) °; Kirby, Ann. & 
Mag. Nat. Hist. (6) xix. p. 605 (1897); (7) iii. p. 866 (1899) °. 
Although Mr. Kirby speaks’ of the presence or absence of supratriangular nervules as variable, I have used 
their absence on the front wing as a character for this species because, out of the seventy-nine individuals 
before me, only two front wings—a left wing of one male, a right wing of another, both from Escuintla— 
possess such a cross-vein. 
The brown at the tip of the front wing extends proximad to the middle (Puerto Barrios, Los Amates, Venezuela, 
Paramaribo, Chapada), or to the proximal end (most of the other specimens), of the stigma. However, 
the variation in the series from Los Amates and Escuintla is sufficient to connect them with each other. 
The brown on the tip of hind wing is always less extensive than on the front. The extent of the brown is 
quite independent of whether the thorax is transversely striated with brown and black or is pruinose- 
blue. 
“‘ Dessous” in the twelfth line of Rambur’s description ° should be “ dessus.” 
Hab. Mexico, Isthmus of Tehuantepec (Sumichrast, M. C. Z.: 1 2); Guatema.a, 
Puerto Barrios {1¢, 39], Los Amates [4¢, 5 2 ], Santa Lucia [26,12], Escuintla 
[7 ¢,15 2], San José [2 3,1 2] (Williamson, Hine, Deam, colls. Wlimsn., O. 8. U.) ; 
Costa Rica, Bebedero (Underwood: 2 3,1 2), Surubres near San Mateo (Biolley, 
coll. Kahi*: 13); Panama’ (M,C. Z.: 3 3, 3 2), Chiriqui (coll. McLachlan: 
2 3), Bugaba (Champion: 1 ¢ ), La Chorrera (Dolby-Tyler *), Obispo (Hassler Exped., 
M. C. Z.: 2 3).—Cotomsia? (coll. P. P.C.: 1 2 with label “ Urac. imbuta, Br.,” in 
Hagen’s hand), Bonda in Dept. Magdalena (H. H. Smith, Carn. Mus. Pittsb.: 1 4 ), 
Bogota (Dohrn, M. C. Z.: 1 3); Venezueta (U.S. N. M.: 19); Surtvam!36, Para- 
maribo * (Miss K. Mayo, A. N. S.: 1 2); Brazit, Para® [1¢ |, Breves®, Bahia! 23, 
Chapada [10 ¢, 6 2 | (H. H. Smith, Carn. Mus. Pittsb.), Minas Geraes® ; ARGENTINA, 
Buenos Aires ®; West InpiEs, Jamaica ‘4, Trinidad 7. 
Taken in January (Los Amates, Para®, Breves5), February (Guatemala, Surubres), 
March (P. Barrios), April (La Chorrera’), August (Para), and October (Bonda). 
Mr. Kirby has separated’§ imbuta, Burmeister, and quadra, Rambur, apparently on 
the ground that the former has “a pruinose-blue male,” while the latter “may be 
known by the upper surface of the thorax being finely and transversely striated with 
brown and black.” This difference is surely one of age only, following the tendency 
of so many Libelluline. The females from Panama show this transition ; none of the 
males before me do, being either transversely striated (younger) or pruinose (older), 
perhaps because the collecting in any one locality has not extended over a sufficiently 
* Mr. Hugo Kahl, of Pittsburgh, Pa., who has generously loaned me his collection for this work. 
