284 HippoBOsoroAE (diptera pupipara.) 



Ornithoctona soror n. sp. (Plate 11, fig. 2a--d, fig. 4.) 



Specimens Examined. Two females from Buchanga 

 stigmatops, Mt. Mnriid. 



Female. (Plate 11, fig. 1.) Length (on slide) 6.5 mm., 

 length of head and thorax 8.5 mm. General color (on slide) 

 a pale brown. 



Head slightly w'ider than long, almost destitute of setae 

 above. Antennae (Plate 11. fig. '2c) about half as long as 

 the head, margined with many slender setae, the apex blunt 

 and but slightly constricted. 



Thorax with the disc entirely bare ; humeral angles strongly 

 and acutely produced, bearing numerous quite long, slender 

 setae ; lateral margin before the base of the wing with numerous 

 setae of various lengihs ; mesonotum with a single very 

 long seta near the base of the wing ; scutellura with four apical 

 setae and margined with a few fine setae. Ventral side bare 

 except for small setae about the mesocoxal cavity ; sternum 

 produced anteriorly into two acute processes (Plate 9, fig. 2d) 

 between the anterior coxae. 



Leys apparently with no specifically distinctive characters 

 except the absence of a lamellate process at the apex of the 

 anterior tibiae. 



Wings (Plate 31. 'io! light brown in color, the veins quite 

 dark; setulae few. arranged in faint, irregular patches toward 

 the apex of the wing, as indicated in the figure ; veins entirely 

 destitute of setae except for the basal portion of the coxa which 

 bears a number of long setae, the remainder of its length beset 

 with small setae. 



.Abdomen membranous throughout except for a naiTow basal 

 segment on the dorsal side ; three small median dorsal sclerites, 

 a pair of small subapical dorsal sclerites and a small basal 

 ventral sclerite. The basal segment on the dorsal side is beset 

 with numerous setae which betjome quite long at the lateral 

 margins ; remainder of the dorsum except the plates and the 

 apex thickly and uniformly beset with small, slender setae, 

 which are not borne upon chitinized prominences. Basal 

 plate on the ventral side with numerous small, stout setae, 

 the remainder of the ventral aspect beset with small setae as 

 is the dorsum, those about the genital opening being long and 

 slender. 



