CANNAPHILA. | 243 
caring and intersegmental sutures of all the segments, also the posterior parts of 6 or 7 and 8 and nearly all 
of 9 and 10, are black. The old females become pruinose on thorax and abdomen, just as the old males. 
The proportions of the hind wing of one specimen of insularis are given as No. 11 of the table on page 240, 
from which it will be seen that those proportions are approximately midway between those of extreme 
angustipennis (No. 1) and extreme vibew (No. 21). It is therefore worthy of note that all six specimens 
of tnsularis before me have only one postcostal cell as stated in the synopsis, page 239, anted ; four of 
them have A, arising at or distal to the second submedian cross-vein (except on the left hind wing of the 
Samana 9, which has but one—the normal first—submedian cross-vein)—hence as stated for angusti- 
pennis; the other two, the Samana g and a d in coll. Adams, have A, arising proximal to the second 
submedian cross-vein (the Adams ¢ has three submedian cross-veins on the right hind wing, the extra 
one being proximal to the normal first)—hence as in vibex. 
Dimensions.—Abdomen, ¢ 26-27, 2 25-27; hind wing, ¢ 30-32, 2 30-33°5 mm. 
Hab. Wrst Inpies, Portland (A. W. S.: 1 ¢) in Jamaica! ?, Samana (Frazar, 
M. C.Z.:1 8,1 2) in Hayti?* (coll. Adams: 2 3,1 9 ; Abbott, A. N.S8.: 1 2). 
The Haytian specimens of Mr. Adams’s collection were taken in March and April. 
Mr. Henshaw has reminded me that some years ago I examined Prof. Uhler’s Haytian 
specimens in the M. C. Z. and labelled them insularis. | 
2. Cannaphila vibex. (Tab. VIII. fig. 35.) 
Libellula vibex, Hagen, Syn. Neur. N. Amer. p. 159 (1861)*; Proc. Bost. Soc. Nat. Hist. xviii. 
p-. 73 (1875) *. 
Libellula merida, Selys, Compt. Rend. Soc. Ent. Belg. xi. p. 67 (1868) *. 
Leptetrum vibex et merida, Kirby, Cat. Odon. p. 26 (1890) *. 
There is considerable variation in the colouring of the sides of the thorax even in individuals from the same 
locality and month and of apparently nearly the same age. Thus of two males from Atoyac in April, one 
has the yellow stripes which lie immediately in front of and in contact with the humeral and obsolete 
first lateral sutures and on the metepimeron well-developed, although not so wide as the intervening dark 
metallic brown ; the other has the first and last of these pale stripes narrower and shorter, while the pale 
stripe of the first lateral suture is represented by two small isolated spots, the lower hardly more than a 
point; neither of these males has any pruinosity and their abdominal segments 1-5 are reddish-yellow. 
Young examples have abdominal segments 1-8 reddish-yellow, only the carine and the sutures black. When 
pruinosity appears, it is on the abdomen first, as individuals with a strongly pruinose abdomen frequently 
show the browns and yellows of the thorax very distinctly. 
The proportions of the hind wing for this species are given in Nos, 13-21 of the table on page 240. 
There is usually no colouring at the tips of the wings, and in no individual before me does it reach farther 
inward than the distal end of the pterostigma, and even then it is a very pale brown. A slight brown 
tinge is often present at the extreme base, which reaches its maximum ina female from Atoyac— 
extending to the second antecubital on the hind, to the first on the front, wing. 
The female from Carrillo has the frons shining red, most of that sex agreeing with the males in having that 
part metallic blue or blue-green. 
Dimensions.—Abdomen, ¢ 24-29°5, 9 24-28°5; hind wing, ¢ 30-35°5, 2 32-36 mm. 
The smallest males are from Santa Lucia, the largest from Onaca and Atoyac. 
Hab. Mexico (U. S. N. M.: 18, badly damaged), Atoyac (Schumann, H. H. Smith: 
12 3,4 2, one of these 2 labelled “‘ Cannaphila insularis, Kirby,” in Prof. Karsch’s 
hand), Cordova (Saussure 1), Orizaba?; GuaTemaLa, San Gerénimo 38000 feet (Cham- 
pion: 26,1 2), Santa Lucia (Hine, O. S. U.: 5 3), Escuintla (Deam, coll. 
Wlimsn.: 1 6); Honpuras (teste Ris in litt.); Costa Rica, Caché (Rogers: 1 ¢ ), 
