( 131 ) 



hind tibiae witb a short spur at ti]i; chiws black, faintly tinged in middle with 

 chestnnt. 



Bnenavista, Bolivia, S. America (./. Stc/itOac/t) ; resembles Pejifiis licros Fabr. 



1 have little hesitation in regarding as cousiiecific with the ? described above 

 two c? specimens from Brazil, in the Mational Collection ; assuming this view to 

 be correct, the S of Mifdas jiraegrandis may be characterised as follows : — 



S. — Length {}l specimens) 47'5 to 4'J mm. ; width of head 8 mm. ; length 

 of antenna 13 mm. ; greatest width of abdomen (across first segment) 'J'5 mm. ; 

 length of wing 4U mm. 



Colour of head, hodij, nnd Uujn as in ? ; colour of anteniiae as in ? , thoiKjh 

 third and fourth joints mai/ be darker {chestnut) ; dark area in triny of same shape 

 and euient as in ? , but much lighter in colour, mum/ni/-ljrotrn, with more or less 

 distinct, jialcr, raw-sienna-coloured, longitildiiml streaks in central jiart : distal 

 fourth and hind border of icing as in ? , but paler, and with a scarcelg noticeable 

 violaceous tinge. 



Head : mystax as iu ?, except that it may contain two or three white hairs 

 on each side ; antennae with a narrow dark band at base of fourth joint. Thorax 

 and abdomen as in ?, except that longer hair clothing dorsum of first abdominal 

 segment is dark brown instead of black. Legs : hind femora stouter than in ? ; 

 hind tibiae with a long curved spine at tip ; chiws longer and more powerfully 

 developed than in ?. All other details (excejjt shape and width of abdomen) 

 as in ? . 



Brazil: type and one other specimen from Parana, 1006 (E. D. Jones}: in 

 British Museum (Natural History). 



It would seem practically certain that the nndescribed female Mi/das from 

 Chapada, Brazil, mentioned by Dr. S. W. Williston (Kansas Acad. Sci., ISOT, 

 ji. 5(i), as, in his belief, "the largest sjiecimen of a dipteron ever recorded, 

 measuring oU millimetres in length with a spread of wings of over lUO," should 

 be assigned to this species. .)/. jiraegrandis is also referred to (as " an indeter 

 minable species of Mgdas from South America "), and figured by Dr. Williston, 

 in his Manual of Sorth American Dipteva, 3rd Edition (New Haven : James T. 

 Hathaway, 10u.s), p. 16. 



