.r. K. MALLOCH 179 



|)().st('rii)r, po.sttTD-dorsal, dor.sal, and a weak antero-dorsal bristle; fore tarsus 

 inueh longer than tibia; mid femur with a strong bristle bej'ond middle on 

 antero-ventral surface; mid tibia with the same number of bristles as in the 

 preceding species; hind femur with two or three bristles on basal half and 

 two or three on apical half of antero-ventral surface, a rather wide space 

 l)etwcen the series, and a few bristles on basal half of postero-ventral sur- 

 face; hind tibia with the usual five bristles. Costal thorn much longer than 

 flic inner cross-vein; costal setulae at least twice as long as diameter of costa 

 up to apex of auxiliary vein, beyond that point a little longer than costal 

 diameter; third vein with a few microscopic setulae at base. Lower calyptra 

 not or very little protruded. Length, 4.5 to 5 mm. 



Typc—d"; Havana, Illinois, April 30, 1914, [Illinois]. Para- 

 (upcs. — 1 (f; Havana, Illinois, June 3, 1918; 1 cf ; Mercdosia, 

 Illinois, August 22, 1917. All three specimens were taken by 

 the writer in dry sandy places, very probably associated with 

 some of the very numerous burrowing bees which occur there. 



Allied to .^pi)io.'<issiina Stein, but that species is larger and has 

 the eyes separated by much more than the width across posterior 

 ocelli. 



Pegomyia emmesia sp. n. 



This species is so closely related to Ilijlrniyin Jui'cnili.s Stein that it is nec- 

 essary only to indicate the points of flifference. 



Male. — Eyes more widely separated than in jurt'itUis, second antennal 

 joint partly pale, arista with sparse short hairs, the longest hairs not nearly 

 as long as width of third antennal joint, palpi much smaller and not broad- 

 ened. Fifth sternite without dense brush-hke fringe of stiff short black 

 setulae on basal half of inner margin of each process. Wings yellowish. 

 Hind tibiae with a posterior bristle in line with the upper postero-dorsal 

 one. 



Male. — Eyes more widely separated than in jumnilis, second antennal 

 joint partly pale, arista with much shorter hairs, palpi much smaller and 

 not broadened, wings yellowish. 



Ff;/A<a/e.— Differs from the female oi jurcnilis in having the cruciate frontal 

 bristles absent, the arista shorter haired, the palpi smaller and not dilated, 

 and the wings conspicuously yellow. The hind tibia in both species in this 

 sex have the same armature and the fore tarsi are slender. 



Length, 5 to 6. .5 mm. 



Typc—d"; Savanna, IlHnois, June 11, 1917, (J. R. Malloch), 

 [Illinois]. Allotype.— 9 ; same locality as type, June 11, 1917, 

 (J. R. Malloch). Paratij pes. —Males and females; Savanna, Illi- 

 nois, June 13, 14, 1917; Ehzabeth, Illinois, July 7, 1917; Ur- 

 bana, IlUnois, July 21, 1889, (C. A. Hart); Oregon, IlHnois, 



TKANS. AM. ENT. SOC, XLVl. 



