BIJ5IO. 169- 



4. Larger species, at least 10 mm. Basal part 

 of 3rd vein usually much longer thau the 



anterior cross- vein o. 



Smaller species, at most 7 ram. Basal part 

 of 3rd vein usually barely (if at all) longer 



thau the anterior cross-vein 6. [p. 169. 



o. Species 14 mm. long hoi-tulanoides, Brun., c5' , 



Species 10-12 mm. kmg obxcuripen7iis, Meij., 



(). Femora wholly bright reddish or yellowish. 7. [p. 170. 



Femora wholly black or dark brown 8. 



7. Femora yellowish, tibine yellow johannis, L., p. 174. 



Femora reddish, tibias and tarsi black .... /7«^e?»Mr,Bruu.,p. 175. 



8. Hind tibife reddish yellow ; veins on pos- 



terior part of wing distinct to hind margin, 



but paler thau tliose in the anterior half . fuscitibia, Brun., p. 175, 

 Hind tibiiTS dark browu or black ; veins 

 uniformly distinct, or those ou posterior 

 half of wing paler, and either distinctly 

 carried to the hind margin or abbreviated, 9, 



9. Veins on posterior half of wing, viewed 



in certain directions, as distinct as those [p. 173. 



in anterior half ; hind tibiae black approximatus, ^iwa., 



Veins on posterior half of wing less distinct 



than those on anterior half 10. 



10. Hind tibias dark brown ; lower branch of 

 4th vein and upper branch of 5th not 

 reaching border of wing defectus, Brun., p. 176. 



Iliud tibiiB black ; all veins reaching wing- 

 margin proximm, Brun., p. 171 . 



The above table is eousfcructed for convenience' sake, and does 

 not illustrate the affinities of the species. The order in which the 

 descriptions are arranged is intended to represent their affinities. 

 Schiner and others have adopted the relative lengths of the basal 

 portion o£ the 3rd longitudinal vein and the anterior cross- vein as 

 the preliminary distinction in separating the species, but in view 

 of its decided variability in B. obscuripennis and the closely-allied 

 European species B. marci, L., it seems safer to distinguish the 

 species comprised in the present work by their conspicuous 

 differences in colour, 



123, Bibio hortulanoides, Bnm. 



Bibio hortulanoides, Brunetti, liec. Ind. Mas. iv, p. 274 (1911). 



(5 2 . Head : in the male the eyes are closely contiguous from 

 the vertex to immediately above the antennae, leaving a very small 

 frontal triangle ; the eyes with dense dark brown hair. Proboscis, 

 palpi, and antenna? black, with thick long dark browu hairs, which 

 are also long and thick behind the vertex. A'ertical triangle con- 

 spicuously elevated, bearing the three ocelli. In the female the 

 frous is one-third the width of the head, shining black, with some 

 short black hairs ; ocellar tubercle as in male. The other parts as 

 in the male, but the hair is more blackish than brown, whilst the 



