204 
Hippoboscidae (Diptera Pupipara) 
Female (Fig. 19). Length (on slide) 2-5 mm. A yellowish brown species, 
the thorax darker than the legs. 
Head with the frons probably almost parallel-sided in perfect specimens 
but in the holotype curving in slightly. Frontal orbits with at least three 
strong setae and several smaller setae. Ocellar setae small. Ventral side with 
a row of slender setae more or less paralleling the orbits. 
Thorax with several short, stout, black setae on the humeral callosities 
and on the margin in front of the wing. Mesonotum with numerous small, 
pale setae, all with distinct pustulations about the base. There is a single long 
seta just behind the humeral callosity, two in front of the wing and one just 
behind the wing. Scutellum with small, pale, pustulated setae on the disc 
and with four long, black setae. Halteres rather small and delicate. 
On the ventral side both meso- and meta-sternum are beset with numerous 
fine setae, mingled with a few that are small and stout. 
Wings (Fig. 20^4) with a well-defined anal cell; R 2+3 distinctly curved toward 
the costa and bristly to the tip; m-cu cross-vein broken, the upper part 
obsolete; vein above cell 2 M, broken near the middle; distal half of the wing 
covered with microscopic setulae as shown in the figure. 
Fig. 20. Ornithoica promiscua n. sp.: A, wing; B, anterior tarsus. 
Legs comparatively strong, the anterior femora noticeably thickened; setae 
arranged in a rather definite fashion, as shown in the figure. Claws (Fig. 20 B) 
rather slender. 
Abdomen above with a chitinized basal plate extending from side to side, 
with four quite large plates occupying the median half and with a small plate 
on each side of the anal region, the basal plate and the succeeding four with 
numerous small setae and the para-anal plates or their immediate region with 
two long setae. Lateral margins with a number of small, stout setae which are 
borne on tubercles. On the ventral side there is a median region beset with 
small setae, a region along the anterior, lateral margin with numerous setae on 
tubercles and a smaller region of these near the genital opening. Near the genital 
opening there is also a pair of small plates bearing several slender setae. 
Notes. One other species of this genus, 0. confluens (Say), has been recorded 
from North America, and, as far as we can learn, all references to this species 
have been based upon Say’s description. We regard confluens as unrecognizable 
from this description and are therefore describing our species as new. 0 . con¬ 
fluens was taken from Ardea candidissima. 
Austen (1903) states that 0. vicina (Walker) may be a synonym of confluens, 
that O. beccariina Rondani from Amboina, on Ardea alba , is identical with 
