CliAULKS 1". ALEXANOKK 251 



Genus POLYMERA Wiedeiiuuin 

 1S21. Poli/mera Weidemann, Dipt. Kxot., i, 40. 



The species of this interesting genus have been considered by the 

 author in eiirlier papers ; the student is referred to the Proceedings 

 of the U. S. National Museum, xliv, 526 to 535. 



Polymera hirticornis Fabricius 



1805. Chironomus hirticornis Fabricius, Syst. Antliar., 40. 



Bartica, one male on January 28, 1913; two females on February 

 11. 1913, March 1, 1913. 



Polymera niveitarsis .Vlexander 

 1913. Polymera nimlarsia .\lexaiuler, Proc. U. S. Nat. Mas., xliv, 532. 

 Bartica, one female, February 14, 1913. 



Polymera obscura Macquart 



1S38. Polymera obscura Mac(]uart, Dipt. Kxot., i, pt. 1, 05. 

 Bartica, one male, Deceml)er 30, 1912. Mallali, one female, 

 March 13, 1913. 



Polymera conjuncta .Vlexandci- 



1913. Polymera conjuncta -Vlexander, Proc. U. S. Xat. Mus., xliv, 529. 



Bartica, one specimen, sex uncertain, January 13, 1913. Mal- 

 lali, one female, March 15, 1913. 



Polymera pulchricornis sp. n. 



Size medium; flagellar segments of the male antennae bi-nodose; wing 

 with cell Ml present; tarsi uniformly brown, similar in color to the rest of 

 the legs; thoracic pleura with a prominent black stripe. 



Male. — Length, 4.4 to 4..j mm. ; wing. 4.0 to 4.7 mm. : antennae about 

 7 mm. 



Female. — Length, 5.7 mm. ; wing, 5.2 mm. 



Male. — Rostrum and palpi brown. Antennae very long and delicate, 

 about half as long again as the body; segments brown, darkest at the nodes 

 which are provided with groups of long out-stretched hairs; flagellar seg- 

 ments bi-nodose. Head grayish. 



Thoracic dorsum light brown, unmarked. Pleura with a very broad 

 dark brown lateral stripe ; stemites and coxae light yellow. Halteres brown. 

 Legs with the coxae as described above; trochanters dull yellow; femora 

 light brown; tibiae and tarsi of all the legs brown. Wings with a light gray- 

 ish brown suffusion; stigma not present. Venation: (see plate IV, fig. 10) 

 Cell .l/i present ; cell .1/ 3 as long as its petiole ; the space on Ri beyond r about 

 one-half that of Ri between Sco and r. 



Tn.\N8. AM. ENT. SOC., XL. 



