144 ENTOMOLOGICAL SOCIETY 



by a number of characters, among which may be mentioned 

 the stalking of vein 3 of fore wings, the short cell of the hind 

 wings, and the short palpi, which exceed the head by less than 

 its length. The accompanying figures (fig. 9) illustrate the 

 venation, the head, and the fore leg, the latter showing greatly 

 developed coxa and femur, which are very thick though flat, 

 evidently used for grasping firmly the hairs of the host. Un- 

 fortunately it is impossible to give any description of the 

 vestiture of the species, owing to the condition of the speci- 

 mens, other than to say they are small dark-gray moths, ex- 

 panding about 16 mm. 



It is probable that the moths live continuously in the fur of 

 the sloth, and no doubt the larvae also, to whose work the matted 

 condition of the animal's hair is in all probability due. 



The specimens, three in number, have been marked with the 

 U. S. National Museum type number 11 500. They were col- 

 lected at Tabernilla, in the Canal Zone, Panama, by Mr. August 

 Busck, June, 1907. 



NEW GENERA AND SPECIES OF DIPTERA. 



By D. W. COQUILLETT. 



Dicranomyia curvivena, n. sp. 



Very near cinerca, but with no dark stripes on the pleura ; both species 

 are pecuHar in having a very short second vein which is evenly arcuate 

 and reaches the costa at a point less than one-third of the distance 

 from apex of first vein to that of the third. Yellow, the antennae and 

 palpi brown, upper side of thorax reddish yellow, opaque, thinly grayish 

 pruinose. Wings hyaline, stigma very pale; base of second vein mid- 

 way between base of third vein and apex of the auxiliary, auxiliary 

 cross-vein about one-third of this distance before apex of auxiliary 

 vein; third vein toward its apex strongly converging with the fourth, 

 first section of the third vein much shorter than the small cross-vein, 

 the latter scarcely shorter than the hind cross-vein ; discal cell closed, 

 second posterior cell about twice as long as the discal. Length 3 mm. 



Plummers Island, Maryland. A specimen of each sex col- 

 lected July 15 and 24, 1903, by Mr, W. V. Warner. 

 Type. — No. 11506, U. S. National Museum. 



Tanypus arietinus, n. sp. 



Near tenebrosus, but much smaller and wholly black except the 

 whitish stems of the halteres and the brown legs. Body polished, meso- 

 notum not vittate. Legs short-haired, tarsi only pubescent, the fourth 



