BRECHMORHOGA. 285 
next below (cf. rapax, infri). None of the hind wings show a single cell reaching from short sector to 
first sector of the triangle. The vulvar lamina of the females is as described under a, above. The 
hamule of the males is a little more strongly curved than in typical pertinax, but is unmistakably nearer 
thereto than to that of rapax. Abdomen, ¢ 35°5-38, 9 37-38; hind wing, g 37-39, 9 40-41°5 mm. 
Front wing: 13-16 ante-, 9-11 postcubitals. Hind wing: 9-12 ante-, 10-13 postcubitals. 
Hab. t Mexico, Orizaba?; Guatemata (A. WM. N. H.: 1); tHonpuras (vide 
page 284, footnote); Costa Rica, Irazu [10 3g, 2 2], Caché [2 o, 2 2 | (Rogers); 
t Panama, ?Chiriqui (vide page 284, footnote). 
6. Brechmorhoga rapax. 
Brechmorhoga rapax, Calvert, Proc. Bost. Soc. Nat. Hist. xxviii. pp. 313, 316, t. 1. fig. 17 (genit. 
of 2, 3), t. 2. fig. 24 (spot on 7) (1898) ’. 
The present material differs from the description’ in having the pale spot on each side of the dorsum of segment 7 
as wide as that side, and reaching from the anterior almost to the posterior margin of the segment, and not 
bilobed. Even less than the posterior inner fourth of the lateral labial lobes may be black. Labrum 
black, with two pale spots at base, or one larger spot by confluence of the two. Wings colourless to 
brownish-yellow, even in the same locality (Carrillo). 
The metallic-blue extends on to the sides of the frons. No single cells reach from short sector to the first sector 
of the triangle on the hind wings. A tendency to depart from some of the generic characters assigned to 
Brechmorhoga on page 201 is seen in the circumstance that in 19 front wings (68 °/,) and 13 hind 
wings (46 °/,) there are two rows of cells between the subnodal sector and supplementary sector next 
below, this irrespective of locality, and that the nodus in some hind wings lies midway between base 
and stigma. 
Front wings: 13-18 ante-, 10-14 postcubitals. Hind wings: 11-13 ante-, 11-16 postcubitals. 
Hab. Guaremata (Van Patten, M. C. Z.: 1 3), San Gerénimo (Champion: 2 3); 
Costa Rica, Carrillo [3 ¢, 1 2), Monte Retondo 1[ ¢ ], San José [1 2 ] (Underwood), 
Caché (Rogers: 5 3 ).— VENEZUELA}. 
Taken in January at Monte Retondo, in March at San José. 
The above-mentioned variations from the generic characters are noteworthy. 
7. Brechmorhoga nubecula. 
Libellula nubecula, Ramb. Névr. p. 122 (1842) °. 
Brechmorhoga nubecula, Calvert, Proc. Bost. Soc. Nat. Hist. xxvii. pp. 313, 314, t. 1. fig. 18 
(genit. of 2, d), t. 2. fig. 22 (markings of 7) (1898) *. 
Macrothemis catharina, Karsch, Berl. ent. Zeitschr. xxxiii. pp. 364, 366 (1890) °. 
Brechmorhoga grenadensis, Calvert, Proc. Bost. Soc. Nat. Hist. xxviii. p. 315 (1898) * (Chiriqui ¢ 
only). 
None of the three Mexican specimens are fully mature, and all have lost at least the last four abdominal 
segments. The two males have the venational and genital characters as given under BB on page 280, 
and are surely conspecific with the South-American specimens quoted. The female, most immature of 
the three, is more doubtful and is chiefly referred here by reason of its having been taken at the same 
place and time as one of the males. 
The South-American material shows a number of differences inter se, and I have thrown these together in 
tabular form to indicate the relations of the Mexican examples. 
BIOL. CENTR.-AMER., Neuropt., December 1906. 9 p 
