60 PROCEEDINGS OF THE NATIONAL MUSEUM vol.93 



three postsutural dorsocentrals, and three acrostical macrochaetae; 

 sternopleural macrochaetae probably three ; midtibiae with one median 

 anterolateral bristle and one inner ventral bristle; no discal 

 macrochaetae. 



This material must be removed from Carcelia amplexa, and Car- 

 celia lagoac covers the requirements of the species. Although the 

 major morphological characters are the same, the author is perplexed 

 by the variation in color between the light and dark forms. While 

 the extreme limits are readily separable, no clear-cut demarcation 

 could be found for the intermediate specimens. 



Adults, June to October, although many of Coquillett's specimens 

 issued during the winter months; number per host, one to several; 

 hibernation, in the host larva or cocoon; generations, uncertain as 

 to number. 



10. CARCELIA FLAVIROSTRIS (Van der Wulp), new combination 



Exorista flavirostris Van der Wulp, Biologia Centrali-Americana, Diptera, 



vol. 2, p. GO, 1800. 

 ZcniUia amplexa of Aldrich and Webber (nee Coquillett), partim, Proc. U. S. 



Nat. Mus., vol. G3, art. 17, p. 13, 1924. 



Head with front of male at narrowest 0.24 and in female 0.26 (one 

 specimen) of head width; frontal row of eight or nine bristles in male 

 and six in female, extending from base of third antennal segment to 

 two reclinate upper frontals (preverticals) ; outer vertical bristle 

 present in female, lacking in male; facial ridge bristly on lowest one- 

 half; gena one-eighteenth eye height; frontal orbit, face, and posterior 

 orbit silvery-white pollinose, frontal orbit and upper half of posterior 

 orbit tinged with yellow, giving a slight brassy appearance ; antenna 

 black, nearly reaching oral cavity, third segment of male over five 

 times and in female four times second; arista thickened on basal one- 

 fourth and located almost at base of third antennal segment, 

 penultimate segment short; palpus yellow. 



Thorax black-gray pollinose; marked with four black mesonotal 

 vittae; four postsutural dorsocentral macrochaetae; scutellum mostly 

 black tipped with reddish yellow, three pairs of marginal scutellars 

 and one apical pair, one pair of discal scutellars; two sternopleural 

 macrochaetae; legs black; fore tibia with one median posterolateral 

 bristle; midtibia with one median anterolateral bristle, one small 

 inner ventral bristle; hind tibia ciliate, with one longer bristle; third 

 vein of wing with two bristles at base, squamae white. 



Abdomen black covered witli light-gray pollen ; first segment, pos- 

 terior third of second and third segments, posterior half of fourth 

 segment, and narrow dorsal vitta shining black; abdominal hair de- 

 pressed on second and third segments in female; fourth segment with 

 a row of discal macrochaetae, pollen of fourth interrupted at this 



