Gymnophora. 



431 



in the middle of this swelling a translucent dot is seen; divisions 

 2 and 3 of about equal length; fourth vein curved somewhat strongly 

 upwards in the apical part, ending anterior to the end of fifth vein. 

 Halteres yellowish white. 



Female. Similar; abdomen without tergal piates on fourth and 

 fifth segments; the second tergal plate is somewhat triangularly 

 pointed at the sides, with the hind corners broadly cut ofT; the third 



Fig. 127. Wing of G. arcuata ?. 



tergite is small, narrowed backwards, trapezoidal, the sixth is rounded 

 behind, generally not, or not much, longer than broad; the eighth 

 sternite excised in the hind margin. 



Length 2 to fully 3 mm, the female generally the larger. 



Remarks: I have seen three type-specimens of Trineiira rufipes 

 from Fallén's collection, the two were males, pinned on one pin, and 

 they belonged to the present species, the third was a female and 

 belonged to quartomolUs. Professor Sjostedt kindly communicated 

 to me that in the collection are in all three males and seven females. 

 — I have also seen Zetterstedt's specimens of G. arcuata] there are 

 in his collection twelve specimens, seven belong to the present species^ 

 five to quartomolUs. 



G. arcuata is common in Denmark; Charlottenlund, Dyrehaven, 

 Egebæks Vang, Holte, Geel Skov, Suserup Skov at Sorø, Tisvilde, 

 Jægerspris, Bogø south of Sealand, on Langeland at Lohals, on Falster 

 at Marienlyst, in Jutland at Hejls south of Kolding, Vejle and in 

 Egense Skov at the east end of Limfjorden, and fmally on Bornholm 

 at Rø and in Almindingen; the dates are "/e— ^Ve; I have taken it 

 in copula on ^^ly to ^V?. 



Geographical distribution: — No doubt all Europe, towards the 

 north to northern Sweden, and it occurs also in North America (see 

 Brues, Ann. Mus. Nat. Hung. IX, 1911, 441.) 



