ZENILLIA AiSTD ALLIED GE'NERA SELLERS 69 



Adults, June; number per host, one to several; generations, one; 

 hibernation, in the puparium. 



15. CARCELIA YALENSIS, new species 



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



Nat. Mus., vol. 63, art. 17, pp. 13-14, 1024. 

 Zenillia n. sp. (2) (partim), Schaefner and Griswold, U. S. Dept. Agr. Misc. Publ. 



1S8, p. 113, 1934. 



This species is most easily confused with Carcelia perplexa and C. 

 diacrisiae. The male, which is most likely to be confused with C. 

 perplexa, is separated only by the blacker abdomen and the lack of 

 reclinate frontal bristles other than the two reclinate preverticals. 

 In the female the black abdomen and the two pairs of marginal macro- 

 chaetae on the second segment serve to separate this species from G. 

 perplexa; while the fore tibia with two posterolateral bristles, second 

 segment of the abdomen with two pairs of marginal macrochaetae. 

 narrow dorsal vitta, and apical margins on segments 2 and 3 readilj 

 separate this species from C. diacrisiae. 



Female (type). — Head with front at narrowest 0.30 head width; 

 frontal rows of eight bristles, extending from below arista to two rec- 

 linate upper frontals (preverticals), frontal bristles on parafacial 

 situated halfway between facial ridges and eye margin; facial ridge 

 bristly on lowest one-fifth; gena less than one-fifteenth eye height; 

 frontal orbit, face, and posterior orbit light-gray-silvery pollinose; 

 antenna black, third segment slightly more than three times second; 

 arista thickened on basal two-fifths, penultimate segment short; palpus 

 yellow. 



Thorax covered with gray pollen ; five black mesonotal vittae ; four 

 postsutural dorsocentral macrochaetae ; scutellum yellow, three pairs of 

 marginal scutellars and one decussate apical pair, one pair of discal 

 scutellars ; two sternopleural macrochaetae ; legs with tarsi and femora 

 black, tibiae brown (yellowish) ; fore tibia with two median poster- 

 olateral bristles; midtibia with one median anterolateral bristle, one 

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

 near middle; wing with two to three bristles at base of third vein; 

 squamae white. 



Abdomen black covered with thin light-gray pollen, heavier on sides 

 and bases of segments ; first segment, narrow apical margin of second 

 and third segments, and narrow dorsal vitta shining black ; first seg- 

 ment with one pair, second with two pairs, and third with a row of 

 marginal macrochaetae; fourth segment covered with erect bristles 

 one-half size of macrochaetae of third segment; no discal macro- 

 chaetae; hairs erect on discal areas, depressed on sides of second seg- 

 ment, and suberect on sides of third. 



