330 TABANID.E 



individuals above pine etumps (as seen by Colonel Yerbury at Nairn on 

 July 9, 1904) ; they alternately rise and fall between five and twelve feet 

 from the ground, and when the sun is obscured rest on the j^ines ; I have 

 never seen this habit, but have commonly found them resting on posts or 

 rails, or towards evening on flowers. 



Table of Species. 



Males. 



1 (2) Third joint of antennae entirely blackish, no trace of reddish 



colour being visible. 



The blackest species of the genus. Basal joint of antennae very 

 mucli swollen and practically all shining black. Wings darkly 

 marmorate. Actual base of front tibite distinctly blackish and 

 followed by a rather narrow luteous band, 



2 crassicor7iis. 



2 (1) Third joint of antennae more or less reddish brown about the 



base. 



Brownish black species. Basal joint of antennae obviously dulled 

 by dust on the basal portion. 



3 (4) Tuft of hairs behind the vertex long and black. 



Actual hindmargin of wing to a large extent hyaline. Knob of 

 halteres not conspicuously pale on the top. 



1 ijluvialis. 



4 (3) Tuft of hairs behind the vertex shorter, denser, and all tawny. 



Actual hindmargin of wing not at all hyaline. Knol) of halteres 

 whitish on the top. JScutellum and base of abdomen with longer much 

 more bushy pubescence than in the other species. Actual base of front 

 tibice indistinctly darkened and followed by a broad luteous band. 



3 italica. 



N.B. — //. Bigoti $ probably resembles H. italica, but may have 

 more sharply defined markings, especially on the abdomen, and less 

 washed-out wing-markings. 



Females. 



1 (6) Basal joint of antennae more or less ovate, and shining on at least 



the tip. 



2 (.5) Antennae with the third joint more or less reddish about the base. 



Basal joint of antennae moderately incrassate, and shining at the 

 tip only. 



3 (4) Femora blackish on the ground colour. 



Wings muddily marmorate. Abdominal markings hardly extended 

 to the two basal segments. 



1 pluvialis. 



4 (3) Femora luteous on the ground colour. 



Abdominal markings extended to even the basal segment. 



4 Bupti ? 



5 (2) Antennic with the third joint entirely blackish. 



Wings darkly and clearly marmorate. Femora entirely blackish. 

 Basal joint of antennaj considerably incrassate, and almost wholly 

 shining. 



2 crassicornis. 



