THE CANADIAN ENTOMOLOGIST 14H 



The female sex of this beautiful crane-fly has never been described. One 

 specimen was taken at Flores, Brazil, November 12, 1919, by Mr, H. S. Parish 

 and may be described as allotypic. 



Allotype. — 9 , length 11.5 mm.; wing 11.8 mm. 



Rostrum and palpi very small, dark brown. Front obscure yellow. 

 Antennre black, the flagellar segments subcylindrical, feebly constricted beyond 

 mid-length. Head moderately large, the vertex very narrow between the eyes 

 and here with a sparse gray bloom ; remainder of the head dark brownish black. 



Thorax shiny black, the dorso-pleural membranes obscure yellow. Legs 

 with the coxa? shiny black, the fore coxa? rufous apically; trochanters rufous; 

 femora rufous, narrowly blackened basally and with the tips broadl>' black; 

 tibiae black, the bases a little paler; tarsi brownish black. Wings as in the male; 

 cell 1st Mi open by the atrophy of the outer deflection of M-i. 



Abdomen reddish, the seventh and succeeding segments black. Ovi- 

 positor with the tergal valves rather short and slender arising from a long basal 

 shield, the apex dilated into a compressed tridentate blade, the ventral tooth 

 larger and more flattened ; from near the base of the tergal valves on the outer 

 side, a pencil of long, curved, yellow bristles that are directed caudad and laterad ; 

 sternal valves of the ovipositor longer than the tergal valves, originating op^ 

 posite the base of the dorsal shield, the tips acute. 



Subgenus Polymerodcs, subg. n. 



Characters as in Polymera, s.s., but the tibial spurs lacking. \'enation 

 reduced, cell Mi lacking and cell Mg small, not longer than its petiole. 



Type of the subgenus. — Polymera (Polymerodes) parishi, sp. n. 



This new group is necessitated for the reception of three small species of 

 Polymera in which the tibial spurs are quite lacking. In the typical subgenus, 

 the tibial spurs are long and visible even with a hand-lens. It is very difficult 

 to classify such forms since the females invariably run out to the genus Eriopiera 

 by means of the existing keys. The males have the beautiful bi-nodose antenna^ 

 of the typical subgenus. The species, besides the type, that are referable to 

 this subgenus are P. conjuncta Alexander and P. conjunctoides Alexander. 



The three known species may be separated by means of the appended key: 



1. .Size larger (wing of the male 4 mm. or over); antenna* conspicuously 



annulated, the base and apex of each flagellar segment light \ellow, 

 the remainder of the segment black; thoracic pleura with a very broad. 



black stripe that almost covers the entire region parishi, sp. n. 



Size small fwing of the male less than 4 mm.); antenna' uniformly black; 

 pleura uniformly pale or with a narrow dark stripe 2. 



2. Thoracic pleura with a narrow but distinct black longitudinal 



stripe conjunctoides Alexander. 



Thoracic pleura without a distinct dark stripe, the pleura being approxi- 

 mately concf)lorous with the dorsum conjuncta Alexander. 



Polymera (Polymerodes ) parishi, sp. n. 



Flagellar segments black, annulated with yellow; thoracic pleura largely 

 black.  . 



