88 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 







Baron Osten Sacken has since placed this as a synonym of Procta- 

 canthus Milbertii Macq. in the second edition of his Catalogue of the de- 

 scribed Diptera of Xorth America (1878), p. 81. 



LYDELLA DUIIYPIH >i: .1:, New Species. Length 0.-2."> [=(3' nm ]. Alar expense i.4~' [ = 

 12"']. Auteuu;e black. Palpi fulvous. Face silvery white. Front silvery, tinted 

 with pale golden-brown, with a broad middle stripe black. Thorax cinereous with 

 imperfect black stripes. Abdomen black and silvery-ash, changing into each other 

 when viewed from different angles. When viewed from above : first segment deep 

 black with a posterior border of silver-ash very narrow in the middle, much widened 

 laterally, but abbreviated at the sides of the abdomen. The other segments with the 

 basal half silvery-ash, terminal half black. Legs black. Fourth longitudinal vein of 

 the wings straight after the angle. Posterior transverse vein arcuate. 



Described from numerous bred specimens. [First Rept., pp. 111-112. Fig. 48. 



This species is referred by Osteu Sackeu to the genus Exorista of 

 Schiner, Lydella not being received as a distinct genus. The name 

 Lydella is used also for a genus of Acarina. 



EXORISTA FLAVICAUDA. N. Sp. Length 0.35 to 0.50 inch [=8.5-12.5"""]. Head 

 broader than thorax : face, silvery-white, the cheeks inclining to yellow, with lateral 

 black hairs extending to near the base of antennas, and one stiffer and longer bristle at 

 top of cheeks ; front, dusky, ferruginous, with two rows of black converging bristles ; 

 divided by a broad depressed stripe of a brighter ferruginous color and without bris- 

 tles ; occiput bright ferruginous; labium ferruginous with hairs of same color; maxi- 

 palps rufous ; eyes dark mahogany-brown, and perfectly smooth ; antenna?, two basal 

 joints rufous, with black hairs, third joint flattened, dusky, and thrice as long as 

 second ; seta, black ; entire hinder part of head covered -with dense white hairs. 

 Thorax, more decidedly blue than in leucani<r, broader (instead of narrower) in front 

 than behind ; the vitta- less distinct ; scutel of same color as thorax. Abdomen, stout 

 and more cylindrical than in leueanm ; first joint dark bluish-gray; second, light blu- 

 ish-gray, becoming darker along the middle, at sides and at lower border ; third joint, 

 like second above, but golden-gray at sides (no rufous) ; last joint entirely yellow or 

 pale orange, with no other color and but few black bristles around anus. Wings more 

 dusky than in leucanife; alulae, opaque bluish-white. Legs, black; pulvilli pale yellow. 



Described from one captured, 4 bred 5 . Space between eyes at occiput fully one- 

 third the width of head. [Second Rept., pp. 51-52. Fig. 18. 



TACHINA [EXORISTA] PHYCIT.E, LeBaron /ta#o. Length, 0.20 inch [=5 mm ]. 

 Antenna 1 black, third joint twice as long as the second ; face silvery, without bristles 

 at the sides ; sides of the front silvery at the lower part, pale golden above ; the mid- 

 dle black vitta occupying a little more than half of the width of the inter-ocular 

 space ; frontal bristles continued down the face to opposite the end of the second joint 

 of antenna- ; palpi blackish-brown ; eyes hairy. Thorax black, with the ordinary- 

 cinereous stripes scarcely perceptible. Abdomen black, varied with cinereous at the 

 base of the segments; a large fulvous spot on the side of the abdomen occupying 

 nearly the whole of the side of the second segment, half or more of the third, and 

 sometimes a small spot on the first ; bristles on the middle as well as at the hiud-niar- 

 gin of the second and third segments. Venation of the wings of the usual type ; firs* 

 posterior cell almost closed, before the end of wing ; fourth long vein slightly curved 

 after the. angle ; fifth long vein prolonged to the margin ; hind cross vein moderately 

 sinuous. Tarsal claws and pulvilli unusually long. 



Female ? A single specimen, a very little larger than the others, was obtained 

 from the same lot of leaf-crumplers, which possibly may be the 9 of the same species. 

 It differs as follows : Front broader ; auteume dark brown ; the cinereous markings of 

 the body more distinct ; the tip of abdomen fulvous, but without the fulvous spot at 

 the sides ; and with the tarsal claws of ordinary length. 



