74 ENTOMOLOGICAL NEWS [Mar., '19 



Erythrodiplax umbrata (Linnaeus). Iguana, open marsh, Aug- 

 ust 24, 1 $ . Quirigua. February 8, 1 teneral $ ; open country, 

 March 3, 1 $ not fully colored, the dark band on the wings smoky 

 brown instead of pale ochraceous, ill-defined, much narrower at 

 the hind margin than at the costa. 



Erythrodiplax ochracea ochracea (Burmeister) Ris. Cayuga: 

 forest, March 29, 1 teneral $ ; April, 1 ^ ;May 19, 1 $ ; near 

 stream in bananas. May 28, 1 $ , "thorax black; abdomen reddish 

 purple; base of wings rich brown"; 1 9, "thorax greenish yellow 

 shaded with brown above, abdomen black with yellowish streaks 

 on each segment; base of wings orange brown"; August, 1917, 

 1 teneral ^ . Quirigua, 1 teneral $ . 



Erythrodiplax connata fusca (Rambur) Ris. Cayuga, May 1, 

 1916, 1 $ , "at light, 2 a. m., quiet night," abd. 16, hind wing 20, 

 pter. f. w. 2.5 mm.; stream in bananas, May 28, 1 ^ , "thorax, base 

 of abdomen and base of w-ings dark brown, abdomen lilacine, 

 terminally black," abd. 20, hind wing 22.5, pter. f. w. 3.5 mm., the 

 brown at base of hind wings not quite attaining triangle; October 

 27, 1 ?, 16, 20 and 2.5 mm.; bananas, October 29, 1 teneral $, 17, 

 22, 2.5 mm., I ^ , 16, 20, 2.5 mm. Montufar, November, 1917, i ^ , 16, 

 20, 2.5 mm. Iguana, open marsh, August 24, 31^, 16.5-18, 19.5-22, 

 2.5-3 mm. All of these specimens fall under the section Erythrodiplax 

 connata, e, Biologia, pages 259, 261. The measurements and other data 

 here given may aid in the ultimate elucidation of this variable species. 



Dythemis velox Hagen. Cayuga, forest, September 4, 1 $ . 

 Gualan, August, i $ . Joaquina, April 28, i 9 . 



Brechmorhoga vivax Calvert. Chejel, June, 2 $ , one having in 

 the posttriangular field, hind wings, three single cells, then two 

 rows, hence as in B. nubecula. 



Brechmorhoga praecox praecox (Hagen) Ris. Escuintla, forest 

 stream. July 12, 1 $ . 



Brechmorhoga pertinax pertinax (Hagen) Ris. Purulha, June 

 27, I ^ ; forest stream, July 7, i 9 . This is B. pertinax, a, of the 

 Biologia, page 284. 



Brechmorhoga rapax crocosema Ris. Chejel, June 18, 1 9 . 

 "markings greenish blue, spot on abdomen orange;" June 17, i^ ; 

 August, I 9 . This is the Guatemalan-Costa Rica form of rapax of the 

 Biologia, page 285, not of the original type form of rapax which is 

 Venezuelan. 



Brechmorhoga inequiunguis (Calvert). Escuintla, July 6, 1 9 . 



Dr. Ris (Cat. Coll. Zool. Selys, fasc. ix, p. 34, 1909; fasc. 

 XV, pp. 868, 870, 1913), defining the genera on a somewhat 

 different basis, has referred this species to Macrothemis, as I 



