574 MAJOR B. E. AUSTEN ON THE 



third tei'gites at any rate are only noticeable on close scrutiny, 

 sixth tergite clothed with longer hair of similar colour; lateral 

 extremities ol' second tergite, except posterior angles, clothed 

 with dark brown or brownish hair, those of third and fourth 

 tergites fringed with longer, outstanding, closely set, shining, 

 cinnamon-rufous or russet-tawnj'^ hair, lateral extremities of fifth 

 tei'gite with a shorter, thinner, and paler fringe of similar char- 

 acter ; first sternite mummy-brown or sepia-coloured (hind border 

 smoke-grey or drab-grey pollinose), clothed with fine and fiiirly 

 long, erect, dark brown hair; remaining sternites sepia-coloured, 

 lateral extremities of third and following sternites paler (ochra- 

 ceous-tawny) ; second and two following sternites (except lateral 

 extremities of third and fourth), and central poi-tion of fifth 

 sternite thinly clothed with fine, dark bi'own hair, which on 

 second sternite, at least anteriorly, is longer and erect, but else- 

 where is shorter and appressed ; sixth sternite, and lateral 

 exti-emities of the two preceding sternites, clothed with russet- 

 tawny hair; membrane connecting sternites with corresponding 

 tergites longitudinally wrinkled, dark brown in case of first seg- 

 ment, and in case of succeeding segments dark brown in front 

 and ochiaceous-tawny behind. Wings sepia-coloured, with pale 

 (cream-bufi") markings as shown in text-fig. 4, these markings 

 occupying cori'esponding positions to those in wing of P. tabaninus 

 Thunb., but somewhat more restricted in extent; darkest areas 

 in wing are those which are usual in this family, namely first 

 costal cell and cell immediately below, second costal cell except 

 its distal extremit)', first basal cell except its base and tip, and a 

 smaller and somewhat ill-defined area including stigmatic region, 

 exteiiding from costa to distal half or three-fourths of discal cell, 

 with an outward extension along third longitudinal vein ; veins 

 for most part ferruginous or mummy-brown, paler in pale aieas. 

 Squamce blackish-brown, fringed with similarly coloured hair, 

 and also with a tuft of shining tawny or russet hair. Ilcdte.res : 

 stalks ochi^aceous-buffi or ochraceous-tawny, knobs mummy- 

 brown. Legs uniformly russet or chestnut-brown, tarsi some- 

 times paler (cinnamon-x-ufous) ; legs clothed with glistening 

 hair of similar colour, long and fine on front and hind femora 

 short elsewhere, hair on femora sometimes ai)i)eaiing dark brown, 

 sometimes tawny; claws orange-cinnamon or russet, their distal 

 exti-emities black ; pulvilli and empodia ochraceous-bufi[" or 

 orange-lmff. 



Guatemala and Mexico. Holotype, Pancina, Vera Paz, 

 Guatemala [G. 0. Champion)', two paratypes, Cuesta de Misantia, 

 Mexico {M. Tnijlllo). The holotype is the specimen briefly 

 described, but not named, by Osten Sacken (Biol. Oentr.-Amer., 

 Dipt. i. p. 68). 



Through the kindness of Mr. J. E. Oollin, the British Museum 

 (Natural Histor-y) has received a solitary cJ of this species, which 

 unfortunately is in poor condition and is Avithout a locality 

 label. In the Bigot collection, whence it was taken, this fly was 



