246 PAPERS BY DK. B. CLEMENS. 



slightly compressed,, rather thicker and longer than the ter- 

 minal joint, which is cylindrical. Maxillary palpi extremely 

 short. Tongue clothed with scales at the base, and about as 

 long as the anterior coxae. 



H. Bassettella. Fore-wings bright reddish-orange, some- 

 times tinted with yellowish-orange, with a black spot at the 

 base above the fold of the wing, and a broad black stripe, 

 showing bluish or greenish reflections, along the inner mar- 

 gin, extending from the middle of the fold to the tip of the 

 wing and occupying nearly one-half of the breadth of it. 

 Along the costa, about the middle of it, is a shining black 

 stripe, which becomes narrower as it approaches the apical 

 third of the wing. Cilia blackish. Hind-wings shining, 

 dark greenish-black. 



Head and thorax black. Antennas black. Labial palpi 

 yellowish-orange. 



I am indebted to the kindness of Mr. H. F. Bassett, of 

 Waterbury, Conn., for a number of specimens of this inte- 

 resting gall miner. Mr. B. says the species is rather com- 

 mon in his neighbourhood, and the larva feeds in a gall found 

 on t( a species of oak which I call Q. tinctorial 



The galls are formed on the smaller branches, three or four 

 being aggregated, are globular, yellowish-brown, shining and 

 hard. 



The species is dedicated to the discoverer, who will doubt- 

 less work out its larval history. 



CYCLOPLASIS, n. gen. 



This new generic type is an extremely novel and interest- 

 ing one, not only on account of larval history, but the struc- 

 ture of the perfect insect. It is a type that is probably pecu- 

 liar to our own continent. 



The hind-wings are so extremely narrow as to be hair-like, 

 or spine-like, dilated near the base, so as to resemble a paddle ; 

 they are adorned with very long cilia. The median vein is 



