18 Bulletin of the Brooklyn Entomological Society Vol. XIII 
parison with the male of L. davisi wishes to point out the distin- 
guishing characters. 
6. Length 5.4 mm., width 214 mm. Differs from davisi in having the 
second antennal segment longer (1.77 mm.), equal to the length of the 
pronotum plus the head to the front margin of the eyes; rostrum reaching 
to the front margin of the middle cox; apical half of the left genital 
clasper very broad and spatulate, twice as broad as in davisi. 
Allotype: 3, July 26, 1917, Mt. Lemon, altitude 9,000 feet, Santa Cata- 
lina Mountains, Arizona (H. H. Knight). 
A NEW SPECIES OF HARTOMYIA FROM ILLINOIS 
(CERATOPOGONIDA, DIPTERA). 
By J. R. Mattocu, Urbana, IIL. 
The type specimen of the species described in this paper is de- 
posited in the collection of the Illinois State Natural History 
Survey, Urbana, Illinois. . 
Hartomyia lutea sp. n—Female: Pale yellow, shining; eyes black. Eyes 
almost touching above; antennze about three fourths as long as entire body, 
shortest flagellar joint (second) at least three times as long as wide, basal 
joint twice as long as second. Thorax with a few slender black bristles. 
Legs slender, all tibiz with rather sparse black setulose hairs; basal tarsal 
joint on all legs nearly as long as next four together; fourth joint obcor- 
date; outer tarsal claw on all tarsi about three times as long as inner; fifth 
tarsal joint unspined ventrally. Third vein ending at five sixths the wing 
length; second branch of radius one third from base of third; petiole of 
“media very short. 
Length, 2 mm. 
Type locality, Elizabeth, Ill., July 7, 1917 (J. R. Malloch). 
This species differs from gilva Coquillett, to which it 1s most 
closely allied, in having the tarsal claws unequal in size. No 
other described North American species than the above two is 
entirely yellow. : 
