314 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Front wings with 11-14 antenodals, 6-9 postnodals, hind wings 
with 8-9 antenodals, 8-12 postnodals. 
Abdomen £ 36-43, 9 37-45; hind wing g 34.5-39.5, 9 36.5- 
43 ; pterostigma 2.25-3 mm. 
Distribution. Texas: two males and three females, types of 
Hagen, Pecos River, July 2, August 5, 7, 24 ; one female San 
Antonio by A. Agassiz; live females no locality labels—these eleven 
in the Museum at Cambridge; one male Round Mt., Blanco Co., 
by F. G. Schaupp, in Coll. P. P. Calvert. Baja California, Mexico, 
Sept., Oct. (Calvert l. c. 1895). 
2. B. nubecula Rambur. PI. 1, fig. 18, pi. 2, f. 22. 
Libellula n. Ramb., NCvr., p 122,1842. 
\ 
The vertex and frons superiorly metallic blue ($ ), yellowish or 
luteous with a trace of metallic blue ( 9 ) • Lips yellow. 
Vulvar lamina excised, lobes extremely short. 
Front wings with 13-14 antenodals, 8-12 postnodals, hind wings 
with 9-11 antenodals, 10-13 postnodals. 
Abdomen $ 38, 9 35-36; hind wing $ 40, 9 37-39; ptero¬ 
stigma 2.5. 
Distribution. One male, one female “Brasil Germ,” two females 
“ P. Br.” in Selys’s hand — all at Cambridge. 
3. B. postlobata sp. nov. PI. 1, fig. 13, pi. 2, fig. 26. 
The character which has suggested the name of this species, — the 
presence of a posterior process on the genital lobe, — distinguishes 
it from all other species of Brechmorhoga. A detailed description 
has already been prepared for publication in the Proceedings of the 
California academy of sciences; here will be given only those 
details as for the other species. Frons superiorly and vertex with 
more or less metallic blue. Free margin of labrum partly or 
entirely edged with brown or black. Lateral labial lobes yellow, 
inner third or less brown or black. Wings faintly yellowish, 
darker yellow in the postcostal space for one cell at the extreme 
base. 
Front wings with 9-11 antenodals, 6-7 postnodals, hind wings 
with 8 antenodals, 8 postnodals. 
$ Abdomen 36-37, hind wing 32, pterostigma 2-2.5. 
Distribution. Mexico; Tepic, two males, November (Cal. Acad. 
Sci. Coll., Coll. P. P. C.); Mazatlan, October, 1873, by Crotch 
(Mus. Comp. Zool.). 
