194 NEUROPTERA. 
stimmt besser mit nervosa, Karsch u. Kolbe (@) tiberein. Vermuthlich ist also 
Burmeister’s Art eine Mischart. Leider ist bei dem 2 die Basis des Hinterleibes 
stark verletzt, so dass ich nicht feststellen kann ob Segm. 3 stark verschmalert ist.” 
5. Gynacantha tibiata. (Tab. VIII. figg. 24, 29.) 
Gynacantha tibiata, Karsch, Societas Entomologica [Zurich-Hottingen], vi. p. 121 (1891); 
McLachlan, Ann. & Mag. Nat. Hist. (6) xvii. p. 416 (1896) *. 
g. As compared with the description of the unique male type, the present material shows the following 
differences, some of which are no doubt due to their colours being better preserved :—Face pale green ; 
thorax evidently bright green in life, some showing traces of an inferior antehumeral brown stripe which 
does not reach the antealar sinus; basal half or more of all the femora, a superior line on the first tibie, 
and the second and third tarsal joints of the second leg, in addition to those parts mentioned !, yellow ; 
the femora, however, apparently blacken with age ; abdominal segment 2 blue, with a transverse brown 
band, interrupted mid-dorsally, behind the transverse submedian carina and a brown submedian spot on 
each side in the basal half; in other individuals the brown occupies a rather larger area ; 3-6 or 7 pale 
greenish, with a mid-dorsal line and a pair of anteapical spots, brown. Size larger: abdomen (excl. 
apps.) 47-49 (type, d, 41); hind wing 48-50 mm. (type, ¢, 41). 
@ (not hitherto described). Colours similar to those above noted for the ¢, except that the second tarsi are 
darker, obscure, or even black. 
¢ 2. Discoidal triangle of the front wings 5-8-celled, of the hind wings 5-7-celled, often asymmetrical as to 
number ; submedian cross-veins 4-7, antecubitals 22-25, on the front wings. 
Hab. Mexico (coll. C. C. Adams: 1 2), Atoyac in Vera Cruz (Schumann, H. H. 
Smith: 36,1 9), Teapa in Tabasco (H. H. Smith: 1 3); GuatTemata, Panima 
[1 3}, Pantaleon 1700 feet [1 9] (Champion); Panama, Chiriqui? (coll. McLachlan: 
1s, with label “Gynacantha tibiata, Ksch.,” in McL.’s hand), Bugaba (Champion : 
1 36,1 2 ).—Ecuapor}?. 
Taken in March at Teapa, in May at Atoyac. 
The length of the external apical spine of the superior appendages of the males is 
least in those from Mexico, greatest in those from Panama, and intermediate in that 
from Panima (cf. figg. 24, 24 a, 24 6, although fig. 24 6 unfortunately does not show the 
spine). The wings vary from clear to brownish-yellow. 
6. Gynacantha membranalis. (Tab. VIII. figg. 30, 31.) 
Gynacantha membranalis, Karsch, Ent. Nachr. xvii. pp. 281, 303 (1891) *; McLachlan, Ann. & 
Mag. Nat. Hist. (6) xvii. p. 416 (1896) *. 
Gynacantha falco, Hagen, Proc. Bost. Soc. Nat. Hist. xvi. p. 41 (1875) * (no description) [teste 
McLachlan *]. 
As compared with the original description * the following features may be noted: thorax in life largely bright 
green with an inferior antehumeral brown stripe not reaching to the antealar sinus ; the word “ Postcostal- 
raumes” in the eleventh line of the description * is evidently a slip for “‘Subcostalraumes”; the colouring 
on the wings is in all this material deep brown, not “ blutroth,” and may extend only to the first 
antecubital or to the fifth or sixth; auricles of the male superiorly blue, a pair of blue anteapical spots 
on the dorsum of segment 2, 3-7 with a pair of pale (blue ?) triangular dorsal spots just behind the 
transverse submedian suture. 
