Deutsch. Ent. Zeitschr. 1912. 333 



New and little-known species of Ephemerida from 

 Argentine. (Neuropt.) 



By Esben Petersen, Silkeborg (Denmark). 



(With 35 figures in the Text.) 



As a continuation of „New Ephemeridae from Denmark, 

 Arctic Norway and the Argentine Republic" (Deutsch. Ent. Zeitschr. 

 1909) descriptions here follow of some new species from Argentine. 

 My countryman and good friend , Mr. P. Jörgensen, Colec- 

 cionista viajante de la Seccion de Botanica y Biologia vegetal 

 del Ministerio de Agricultura , has niade the collection , partly 

 during his stay at Bompland in Misiones and partly by electric 

 light on board a steamer on Alto Parana , between Posadas and 

 Corrientes. 



1. Spaniophlehia Trailiae Etn. 



Mr. P. Jörgensen has captured a very fine male of this 

 Brasilian species at Bompland. The specimen agrees very well 

 with the description given by Eaton. The only thing I have 

 to add, is, that the first Joint of the setae is very dark, and that 

 my specimen is larger than those Eaton has mentioned. My 

 specimen which is preserved in alcohol, measures : Length 11 mm; 

 wing 11 mm; setae 10 mm. 



2. Campsurus Jörgenseni n. sp. 



Imago, (f (in alcohol). Head dark in front, behind yellowish 

 white and with two violet greyish spots. Thorax above greyish 

 yellow. Prothorax with two, more or less, distinct violet greyish 

 markings ; mesothorax with five violet greyish longitudinal lines, of 

 which the two side lines are touching each other in front, and the 

 three middle ones are running together behind. Abdomen dorsally 

 violet greyish with a fine light middle line on 2"'^ to 1^^ segment. 

 Each of these segments with two light spots on each side of the 

 longitudinal line and with light border behind. The 8'^^ segment 

 darker , without the middle line and the light border and with 

 only one light spot on each side. The 9*^ segment with a fine 

 dark longitudinal line and two small dark spots. Abdomen ven- 

 trally pale violet greyish with a fine light middle line and with 

 one or tWo dark , curved longitudinal stripes on each side of 

 Segments 2 to 8. Spiracles on segments 2 — 7 with a dark lunate 

 spot. Fore legs white with a violet greyish tinge ; hinder legs 

 and cerci light. Wings vitreous. Costa , subcosta and radius 

 violet greyish to a little beyond the middle. The other nervures- 



