BRECHMORHOGA. 283 
8. Brechmorhoga postlobata. 
Brechmorhoga postlobata, Calvert, Proc. Bost. Soc. Nat. Hist. xxviii. pp. 313, 314, t. 1. fig. 13 
(gen. lobe ¢), t. 2. fig. 26 (spot on 7) (1898)*; Proc. Calif. Acad, Sci. (3), Zool. i. p. 392, 
t. 25. fig. 12 (genit. of 2, 9) (1899) *. 
The male from Rio Papagaio has the metepimeron chiefly pale blue, a blue stripe ‘7 mm. wide on the 
. mesepimeron, a faint blue metepisternal line, the rest of the side of the thorax dark brown. The male 
from Venta de Zopilote has the side of the thorax dark brown with the usual mes- and met-epimeral pale 
stripes and metepisternal line. The examples from Tepetlapa are intermediate between the two 
preceding. These differences and those mentioned in the descriptions? of the types from Tepic and 
Mazatlan are due to age, I think. 
Hab. Mexico, Mazatlan (Crotch, M. C. Z.1*), Tepic!? (Hisen & Vaslit, coll. 
P. P. C.: 18), Tepetlapa [2 3], Venta de Zopilote [1 ¢ ], and Rio Papagaio [1 ¢ ] in 
Guerrero (H. fH. Smith). 
The Tepic types were taken in November, all the other specimens in October. 
' Postlobata is the Pacific slope form of precox, and may be merely of subspecific 
rank, 
4. Brechmorhoga mendax. 
Dythemis mendax, Hagen, Syn. Neur. N. Amer. p. 164 (1861)*; Proc. Bost. Soc. Nat. Hist. xvi. 
p. 75 (1875)?; Calvert, Proc. Calif. Acad. Sci. (2) iv. p. 529, t. 16. figg. 56, 57 (apps., 
hamule, ¢) (1895) *. 
Brechmorhoga mendax, Calvert, Proc. Bost. Soc. Nat. Hist. XXViii. p. 313, t. 1. fig. 5 (tarsal claw), 
t. 2. figg. 23, 80 (spot on 7, vulv. lam. 9) (1898) *; Proc. Calif. Acad. Sci. (3), Zool. i. p. 891 
(1899) *. 
Had. Unrrep States, San Antonio 24, Round Mt.4 [1 6], and Pecos River +‘, all in 
Texas; Lower Ca.irornta, Sierra Laguna 3, San José del Cabo [Eisen: 1 ¢, 1 9] 
(coll. P. P. C.).—Mexico, Tepic (Hisen & Vaslit°). 
Taken from July to November at one or other of the above-cited localities #~°. 
5. Brechmorhoga pertinax. (Tab. VIII. fig. 38.) 
Dythemis pertinax, Hagen, Syn. Neur. N. Amer. p. 166 (1861) *. 
Brechmorhoga pertinax, Calvert, Proc. Bost. Soc. Nat. Hist. Xxvili. pp. 313, 316, t. 1. fig. 20 
(genit. 2, ¢), t. 2. fig. 21 (spot on 7) (1898) *. 
? Dythemis sallei, Selys, C. R. Soc. Ent. Belg. xi. p. lxvii (1867) ° (in part.) *. 
Hagen describes * the abdomen as “a little longer than the wings,” but as the presumed type in the M. C. Z. 
has the abdomen 39 mm., the hind wing 41 mm.’, the specimens here referred to pertinax have the 
* Dr. F. Ris wrote to me as follows under date of 2. iii. 05:—“There is a serious difficulty about 
B. sallei. ‘The old Mexican types are of two distinct species. One of them is a form of B. pracox (I received 
the same form from Cuernavaca from Mr. Barrett, and no doubt you will have seen many of them). The 
other is a distinct species (not yet mentioned in your paper on Macrothenis and allies); in this latter the 
