1945] Ten New Species of Empididce 87 
Empis (Enoplempis) ctenocnema, n.sp. 
Length 7 mm. Thorax cinereous piceous, notum quadrivit- 
tate with brown; four small scutellars. Abdomen with a few 
lateral setulae in vertical row on first two segments. Legs in- 
cluding coxae testaceous, tarsi apically piceous, hind femora 
slightly swollen and bent at apical fifth but without any hairs 
at swelling, hind tibiae with slight swelling on underside toward 
knee corresponding with femoral bend and with a slight de- 
pression corresponding with femoral swelling, fringed on both 
sides with close black hairs; when the knee is flexed the femoral 
twist lies between the two fringes. 
Two males, one female, Tuxedo, New York, 29 May 1926. 
Very close to E. nodipes Melander, from New Mexico, to 
which it leads in the table of species of Empis, Trans. Am. Ent. 
Soc. xxviii, p. 284 (1902). It differs from the description on 
page 324 only in the structure of the knee specialization of the 
hind legs. 
