186 NEW NORTH AMERICAN ANTHOMYIIDAE (DIPTERa) 



postero-vcntral series of I)ristles nearly entire and stronger, and the eostal 

 thorns unequal in length. 



Female. — Similar to the male in color, the abdomen unmarked. 



Frons about one-third the head-width, each orbit about one-third as wide 

 as interfrontalia, with five to seven bristles in the usual arrangement, the 

 small setulose hairs absent or present only on upper third; cruciate bristles 

 normally present, strong. Abdomen ovate, with strong apical bristles on 

 all segments and discal bristles on segments two to four; genitalia without 

 thorns. Legs as in male except that the hind tibiae lack the posterior l)ristly 

 hairs. 



Length, 3.5 to 6 mm. 



Type. — d^; Swarthmore, Delaware County, Pennsj^lvania, 

 May 21, 1905, [A. N. S. P., Type no. 6232]. Allotype- 9 ; topo- 

 typieal. Paratypes. — cf and 9 , same data; 9 , same locality, May 

 27, 1905; 1 9, Swarthmore, Pennsylvania, June 22, 1907; 1 9, 

 same locality, May 28, 1907; 1 9 , same locality, June 4, 1905. 



Hylemyia innocua sp. n. 



Male. — Similar in color to setijer (cf.), the thorax less distiiK'tly pruinoscent 

 and the abdomen with a black suffusion on anterior third of each tergite. 



Head as in xetifer, the parafacials at base of antennae narrower than third 

 antennal joint. Thorax with one long and two or three pairs of short pre- 

 sutural acrostichals; prealar about one-third as long as the bristle behind it. 

 Abdomen slightly depressed, narrow, tapered apically; hypopygium normal, 

 superior forceps with five or six very long bristles on each side, inferior pair 

 long and slender; fifth sternite with a blunt-tipped bristle as in gracilipcf: 

 (fig. 31). Fore tibia as in gracilipes- fore tarsus compressed, subecjual in 

 length to tibia; mid tibia with armature as in gracilipes- mid tarsus much 

 shorter than tibia, the basal joint usually with a few long setulose hairs on 

 dorsum; hind femur with a series of bristles on antero-ventral surface, which 

 are very short at one-third from base and become gradually longer to apex; 

 hind tibia with three or four antero-ventral, about eight irregular antero- 

 dorsal and three postero-dorsal bristles, the posterior .surface with a few 

 setulose hairs on basal half; claws and pulvilli of mid and hind tarsi much 

 shorter than those of fore pair. Costal thorn small; veins three and four 

 convergent apically. 



Female. — More densely gray pruinescent than male. Interfrontalia iai-gcly 

 reddish. Thorax not vittate. Abdomen with a dorso-central vitta and 

 lateral n^flcHitions blackish. 



Tibial armature as in male, but lh(> bristles all stronger, esjiecially 

 the one on the antcro-dorsal surface of the mid tibia; apical posterior bristl(> 

 on fore tibia pointed. Costtil thorn and setula(> longer than in male. 



Length, 4 to .'") mm. 



Type.— (T; New Bedford, Massachusetts, (Houfrh). Allo- 

 type. — 9 ; 1()i)o(ypical. Pdralypcs.- -Vwi' males ;ind one I'cmah', 



