315 



Length, .5 mm. 



Type locality, Florida. I have seen a specimen from Beltsville, 

 Md., July 4, 191 5 (W. L. McAtee), which was taken attacking 

 ChaiiUodes sp. 



This species resembles rather closely some species of Ceratopogon 

 but differs noticeably in possessing the long surface hairs in addition 

 to the short upright ones on the wings. Several species of Forcipomyia 

 have been recorded as attacking insects, and in the present paper I 

 record a species of Ceratopogon feeding upon a worm. 



Fiisicornis has not been taken in Illinois and is added here for con- 

 venience of reference. 



JOHANNSENOMYIA AI^BIBASIS, U. Sp. 



Female. — Glossy black. Head black, face yellow, palpi pale yel- 

 low, proboscis reddish yellow. Thorax entirely glossy black, without 

 pruinescence and with inconspicuous dark hairs which are very sparse 

 on center of mesonotum. Abdomen shining, black apically, the basal 

 2 or 3 segments whitish. Legs yellowish white, blackened narrowly 

 on fore knees and apices of fore and mid tibiae, broadly on apices of 

 mid and hind femora and hind tibia?, the latter sometimes with dark 

 suffusion to near base, apical joint of all tarsi black. Wings clear, 

 veins of the basal half very pale, darker from middle to apex. Hal- 

 teres yellowish, knob black. 



Eyes distinctly separated above, antenna slightly longer than head 

 and thorax together, second joint not much swollen, basal eight joints 

 of flagellum distinctly longer than broad, apical five joints much more 

 elongated than preceding joints. Legs slender, without spines or setu- 

 lose hairs; fifth tarsal joint on all legs with 4 or 5 pairs of rather long 

 ventral spines ; tarsal claws long, subequal, each with short subbasal 

 tooth. Wings of moderate width; third vein ends about one fifth 

 from apex; first ends at two. fifths from base of third, its last section 

 distinctly shorter than the preceding one ; media forks before cross 

 vein ; cubitus slightly beyond cross vein. 



Male. — Differs from the female in having the antennae yellowish, 

 with dark plumes ; the coxae brownish, and the fore knees more notice- 

 ably blackened ; the third vein ending slightly over three fourths from 

 base of wing; the fifth tarsal joint without ventral spines; the tarsal 

 claws much smaller and without the subbasal tooth. 



Length : female, 2.5 mm. ; male, 2 mm. 



Type locality. White Heath, 111., May 8-30, 1915 (J. R. Malloch). 



