THE CAXADIAX ENTOMOI-OCilST. 43 



pruinose, hypopygium, except the basal segment, black, the lamellaj 

 whitish, margined vvitii black, except on the basal part of the under side. 

 Cox£e yellow, the extreme base of the front ones partly and the middle and 

 hind ones, except their apices, black, gray pruinose, front sides of the 

 anierior ones covered with short black hairs. Legs yellow, the last joint 

 of the front tarsi black, the middle and hind tarsi from the apex of the first 

 joint brown ; middle and hind femora with a single bristle before the 

 middle of the front side, the hind ones fringed on the underside with long 

 yellow hairs ; front tibise subeqiial in length to the femora, the middle and 

 hind ones slightly longer than their femora ; front tarsi about one-third 

 longer than their fibife, very slender except the last two joints, first joint 

 twice as long as the third, the latter slightly shorter than the second, fourth 

 joint laterally compressed, scarcely one-half as long as the third, fifth joint 

 slightly longer than the fourth, laterally compressed and greatly widened, 

 fringed with black hairs; joints of the other tarsi becoming successively 

 shorter. Wings hyaline, costa distinctly thickened at apex of the first 

 vein, fourth vein not broken, hind margin of the wing evenly convex. 

 Calypteres yellow, the hairs black. Length, about 5 mm. 



Roxborough, Pennsylvania. A male specimen collected June 7, 

 1908, by Mr. H. S. Harbeck. Type No. 12767, U. S. National Museum. 



Family Scopeumidce. 

 The synonyms of this name are : Scatomyzides, P\allen, iSio ; Scato- 

 jjhaginje, Desvoidy, 1S30; Cordyluridse, Macquart, 1835. Article 5 of 

 the International Code of Zoological Nomenclature states that "The name 

 of a family or subfamily is to be changed when the name of its type genus 

 is changed." The type genus of the earliest name is Scatomyza, Fallen, 

 18 10, equals Scopeuma, Meigen, 1800, hence the necessity for changing 

 the name of this family. 



Parallelomma setipes, new species. 



Easily recognized by the colouring of the legs and the unusual 

 number of bristles on them. Black, the front and the second joint of the 

 antennre yellowish-brown, the vibrissal swellings, oral cavity, palpi, apex 

 of proboscis, halteres, tibiae, tarsi, coxae largely, the hind femora and 

 apices of the others, yellow. Arista bare, strongly thickened at the 

 base ; antennse slightly shorter than the face, the third joint about four 

 times as long as the second, concave on its upper edge, the apex rounded. 

 Face and front of nearly an equal width. Five pairs of dorsocentral 

 bristles, the acrostichals arranged in two rows, extending almost across 



