416 TABANID^ 



one single black bristle on tlie palpi and another Scotch, specimen from 

 Aviemore has no tiny pale bristles on the palpi except for a few above the 

 bend • second joint bent blunt angled and thickened bladder-like on the more 

 horizontal basal third but then bending and narrowing to a fine sharp point, 

 the whole joint being three times as long as its thickest part ; basal joint 

 small and mainly with a blackish grey tinge. Eyes bare and without bands. 

 Antennae almost as in the male, but the less reddish third joint with its basal 

 segment longer and the style shorter, the basal segments (apparently three) of 

 the latter being almost quadrate. 



Thorax rather greyer than in the male and with rather shorter less 

 abundant erect black pubescence, and with much more conspicuous pale grey 

 pubescence above the wing-base and along the lower margin of the postalar 

 calli and down the grey stripes of the thorax (especially after the suture). 

 Scutellum with much shorter less abundant erect black pubescence, and with 

 a fairly abundant mai"ginal fringe of pale grey hairs. 



Abdomen broader. Matter, and more oblong than in the male ; middle row 

 of spots more triangular and often extending in a thin point up to the fore- 

 margins ; side rows of spots less lunulate and more sloping from the front 

 outwards, and extending to the hindmargins ; the yellowish coloring about the 

 base of the second and third segments usually more restricted ; pubescence 

 shorter, especially on the sides and down the sidemargins. Belly as in 

 the male. 



Legs more ochreous, and with a silvery shimmer in front of the tibiae ; only 

 the apical half of the front tibi* blackish and just the tip of the middle tibiae 

 brown, though the hind tibiae are still all darker than the anterior pairs, 

 pubescence shorter and paler, there being scarcely any longer black hairs 

 on the middle tibiae ; pulvilli darker. 



Wings, squamae, and halteres almost as in the male. 



Length about 14 mm. but varying from 12-5 mm. to 15 mm. 



This species is most nearly allied in the male to T. macalicornis, from 

 which it may be distinguished by the blacker antennge (at any rate on the 

 basal joints), by the absence of black hairs on the upper part of the side- 

 cheeks, and by the shorter oval end-joint of the palpi, as well as by many 

 minor distinctions which are given under the description of T. maculicornis ; 

 while it is distinguished from all allied species by the brown cross-band 

 from eye to eye which includes the base of the antennae; T. glaucopis is 

 distinguished in both sexes by the shining black space on the frontal 

 triangle. The female may be known from all British species except 

 T. glaucopis by its quadrate or heart-shaped (or at any rate not linear) 

 middle frontal callus, while the bandless eyes and the brown cross-band 

 about the antennse distinguish it from all other known European species. 

 It varies a little in the intensity of the cross-band which includes the 

 antennse (but not enough to cause doubt), and in the colour of the third 

 joint of the antennae which ranges from its normal dull black through 

 more or less reddish brown about its base to (in the male) entirely dark 

 reddish brown or even to reddish orange ; other minor variations in the 

 colour of the pubescence, or of the abdomen or legs, are noted in the 

 description, but the variation in the amount of black bristles on the palpi 

 of the female is remarkable, as it may extend from entire absence to 

 almost exclusive predominance. A male from Asch in Bohemia has the 

 pubescence on the thorax more extensively pale grey, and the thoracic 

 stripes more distinct. 



T. cordigrr appears to be an uncommon British species, and I had 

 little knowledge of it until Colonel Yerbury took a considerable number 

 of both sexes at Aviemore and Nethy Bridge in Inverness-shire in 1899 

 and 1900. I have however other records from Devonshire (Walkham 



