OF WASHINGTON, VOLUME XIX, ;917 2.5 



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Biomyia eleodivora new species. 



Length 10 mm., male, slightly elongate in form, ashy gray opaque, 

 wings fusco-hyaline. Head (pi. 5, fig. 5) of the true Biotnijia form. An- 

 tennae inserted slightly above middle of eyes. Front sloping upward 

 from root of antennae to vertex, is about one-half as wide as width of eye. 

 Yitta occupying approximately one-half of front, black in color. 



Parafacials, parafrontals, occipital border and facial depression sil- 

 ver}' gray pollinose. Frontals descending to tip of second antennal joint, 

 orbital bristles absent. Antennae dark brown, very slender, the third 

 joint a little more than twice as long as the second. Arista longer than 

 antennae, very slender, thickened only at extreme base. Palpi and pro- 

 boscis reddish. Vibrissae long, slender and projecting at right angles to 

 plane of face, inserted well above oral margin. Cheeks ashy gray cov- 

 ered with rows of fine black hairs. Thorax and scutellum rather thinly 

 ashy gray pollinose. Five vittae visible, the middle one obsolete cepha- 

 lad of the transverse suture. Posterior dorsocentrals four; they are un- 

 usually long and slender and nearly erect. Acrostichals in three pairs. 

 Sternopleurals three, pleurae thinly cinereous pollinose. Abdomen en- 

 tirely opaque, rather thinly cinereous pollinose and slightly marmorate. A 

 distinctly median, blackish vitta visible from behind. Venter concolorous 

 with abdominal dorsum. Hypopygium visible, black and bearing a few fine 

 hairs. All segments of abdomen bearing median marginals, no true discals 

 apparent on any segment. Legs remarkably robust, black, all, and es- 

 pecially the hind metatarsi, noticeably swollen (figs. 7 and 8). Hind 

 tibiae not ciliate nor pectinate but bearing a few scattered macrochaetae. 

 Front claws elongated. Wings (pi. o, fig. 6) slightly fuscous, the veins 

 brownish. Squamae white. 



Described fr,om one male specimen reared from an adult of 

 Eleodes tricostata Say, collected by J. S. Wade, at Holdredge, 

 Nebraska. The species is closely related to R. lachnosternae 

 Town., but is evidently quite distinct. 



EXPLANATION OP PLATE V. 



Elertdiphaya c'ljrri/i. 



Fig. 1. Head of male. 

 Fig. 2. Wing of male. 



Eleodiphaga pollinosa. 



Fig. 3. Side view of head. 

 Fig. 4. Front view of head. 



Biomyia eleodivora. 



Fig. 5. Side view of head. 

 Fig. 6. Wing. 



Fig. 7. Hind tibia and tarsus, dorsal view. 



Fig. 8. Lateral view of hind tarsus, showing spiny armament of ventral 

 surface. 



