€attatlian mntomttla^bt. 



VOL. XXVI. LONDON, DECEMBER, 1894. No. 12. 



SOME PSYCHODID.^ FROM LONG ISLAND, N. Y. 



BY NATHAN BANKS, SEA CLIFF, N. Y. • 



Thomas Say described one species of Psychoda from the United 

 States ; Walker described another from Hudson's Bay ; and Dr. VVilliston, 

 in Entom. News, 1893, described a third species from New York. I have 

 noticed in the vicinity of Sea Cliff, N. Y., seven species, only one of 

 which I have identified as previously described. Most of the forms I 

 have collected are probably common elsewhere in the Eastern States and 

 in Canada. 



All the forms known to me appear to be congeneric and belong to 

 Psychoda. They have two veins between the forked veins, more or less 

 pointed wings, and the second longitudinal appears to arise beyond the 

 first basal cell. Pericoma, I should consider to consist of species with 

 rounded wings and the second longitudinal arising before the anterior 

 cross-vein. But Eaton, in his paper on the British species, has placed 

 other forms under it ; however, from his diffuse table it would be almost 

 impossible to obtain any idea of the characters of Pericoma. I think it 

 much better to use the terminology commonly used in Diptera rather 

 than adopt one taken from another order. The species from Long 

 Island are almost identical in venation, presenting 10 principal veins 

 ending in the margin. The small vein at base is the auxiliary vein. The 

 first longitudinal is simple, the second forked near middle of wing, the 

 third forked close to the base, the fourth forked near middle, the fifth 

 simple, and the sixth or anal consists of two branches. The two small 

 cells at base, I should call the first and second basal cells, each bounded 

 by the usual veins. All the veins are nearly straight, and at about equal 

 distances apart, and bear many hairs. There is a fringe all around the 

 wing, but longest on the posterior margin. The legs appear to be about 

 of the same length and shape in all the species. The antennfe vary in 

 length, and in some species are thicker in the males than in the females. 

 The males have a superior and inferior pair of appendages, which consist 

 of two or three joints. 



