BIBIO. 169 



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



of 3rd vein usually much longer than the 



anterior cross-vein 5. 



Smaller species, at most 7 mm. Basal part 

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



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



5. Species 14 mm. long hortulanoides, Brun., c?, 



Species 10-12 mm. long obscuripennis, Meij., 



6. Femora wholly bright reddish or yellowish. 7. [p. 170. 

 Femora wholly black or dark brown 8. 



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



Femora reddish, tibiae and tarsi black .... ?v//?/emMr,Brun.,p. 175. 



8. Hind tibiae reddish yellow ; veins on pos- 



terior part of wing"distinct to hind margin, 



but paler than those in the anterior half . fuscitibia, Brun., p. 175. 

 Hind tibiae dark brown or black ; veins 

 uniformly distinct, or those on 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, Brun., 



Veins on posterior half of wing less distinct 



than those on anterior half 10. 



10. Hind tibiae dark brown ; lower branch of 

 4th vein and upper branch of 5th not 

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



Hind tibiae black ; all veins reaching wing- 

 margin proximus, Brun., p. 171 . 



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

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

 descriptions are arranged is intended to represent their affinities. 

 Schiner and others have adopted the relative lengths of the basal 

 portion of 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, Brun. 



Bibio hortulanoides, Brunetti, Kec. Ind. Mus. iv, p. 274 (1911). 



3 $ . 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 antennae black, with thick long dark brown hairs, which 

 are also long and thick behind the vertex. Vertical triangle con- 

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

 frons 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 



