GYNACANTHA., 191 
It will not be surprising to find almost any of the other American species of 
Gynacantha within the present district, but it seems best to omit them from 
this work. 
1. Gynacantha trifida. (Tab. VIII. figg. 28, 29.) 
Gynacantha trifida, Rambur, Névr. p. 210 (1842)’; Selys, in Sagra’s Hist. Cuba, Ins. p. 459 
(1857)? ; Hagen, Syn. Neur. N. Amer. p. 181 (1861) *°; Kolbe, Arch. f. Naturges. liv. I, 
p. 168 (1888) *; Kirby, Ann. & Mag. Nat. Hist. (6) xix. p. 615 (1897) °; Calvert, An, Mus. 
Nac. Buenos Aires, vii. p. 28 (1899)°; Needham, Proc. U.S. Nat. Mus. xxvi. t. 3Y. fig. 3 
(venation) (1903)"; Butler, Trans. Amer. Ent. Soc. xxx. t. 7. fig. 4 (labium) (1904) °. 
Hab. Untren States, St. Augustine [1 ¢] in Florida [1 ¢] (C. W. Johnson, coll. 
P. P. C.), California (A. V. S.: 1 3,1 2).—Mexico [10 ¢, 6 2], Vera Cruz [1 @ | 
(coll. Adams), Atoyac (Schumann: 1 3; H. H. Smith: 1 2); Honpuras, San Pedro 
Sula (coll. McLachlan: 1 3, 1 2); Cosra Rica, Caché (Rogers: 1 3 ).—CoLoMBia, 
Turbo | Mack: 1 3]; Surinam [Thorey: 1 6°]; Braziu® | Heyer: 1 ¢ labelled 
“Gynacantha elata, Hagen?” in Hagen’s hand, 1 ¢ labelled “ Hschna angusta, 
Hagen,” but not in H.’s hand], Mosqueiro®, Tapajos5, Chapada [1 ¢ | (. C. Z.); 
Paraguay, San Pedro®; Banamas, Nassau, New Providence (Moore & Bullock, Univ. 
of Pa. Eaped.: 1 2); West Inpres, Havana (C. FP. Baker, coll. P. P.C.: 1 3), 
Cuba!23 (Poey, colls. Am. Ent. Soc. M. C. Z.: 2 8, 12), Bath (Jlrs. Swainson, 
coll. P. P.C.: 18,12) in Jamaica 23, Samana (Prazar, M,C. Z.: 26,12) in Hayti 
(Dr. Abbott, A. N. S.: 1 3), Puerto Rico +. 
Taken at Atoyac in May. 
The wings vary from almost perfectly colourless to yellowish-brown throughout ; 
the present material from Haeyti illustrates this. Some females lack the stem of the 
black T-spot on the frons; in others the abdomen is hardly constricted at segment 3. 
It would be interesting to determine from fresh material whether the degree of 
constriction is correlated with the size of the ovaries. De Selys speaks? of the inferior 
appendage of the males as being equal to halt of the superiors, but this does not 
accord with Rambur’s! and Hagen’s? descriptions, nor with the present material 
(see p. 189). 
2. Gynacantha septima. (lab. VIII. figg. 20, 21.) 
Gynacantha septima, Selys, in Sagra’s Hist. Cuba, Ins. p. 460 (1857)"; Hagen, Syn. Neur. 
N. Am. p. 182 (1861)*; Proc. Bost. Soc. Nat. Hist. xi. p. 291 (1867) °. 
In most of the dried specimens the body has faded to a pale brown with traces of paler spots (green in life) on 
the abdomen as follows: most of segment 1, segment 2 with a median, dorsal, longitudinal stripe as long 
as the segment and a submedian and an anteapical spot on each side; 3 with a mid-dorsal longitudinal 
line on the basal half; 3-7 or 8 with a pair of triangular spots just behind the transverse submedian 
suture and a pair of anteapical spots ; most of the sides of 2 and 3. Some examples present the appear- 
ance of having had almost the entire thorax bright green in life. 
3. Anal triangle 2- or 3-celled; one male from Bonda has it 2-celled, but with a rudimentary third cell 
