2. LEPTIS 269 



freely in the Scotch Highlands. My dates extend from May 23 to July 10. 

 It is recorded from Central Europe and Denmark to Italy, but not from 

 North Europe, which does not seem to accord with its British distri- 

 bution. 



Synonym)/.— Cmtiii described and figured this species as Rhagio Henshami from 

 Ambleside, and later on mentioned R. notatus as having occurred near Cambridge 

 but that record in all probability referred to L. tringaria. 



3. L. tringaria Linne. Wings immaculate glassy yellowish, even the 

 stigma being inconspicuous. Thorax with black pubescence. Abdomen 

 mainly orange. 



A rather large fly, with immaculate wings and the abdomen 

 orange with black dorsal spots. 



$ . Face and frons small and (including the side-cheeks) triangular and covered 

 with yellowish grey dust, but the socketed epistoma is almost quadrate and 

 is quite bare ; side-cheeks nearly half as wide as the epistoma, and bearing 

 (except on the upper third) rather long and conspicuous hardly sparse pale 

 yellow pubescence, and this pubescence extending and becoming longer on the 

 rather narrow jowls and on the rather shallow lower half of the back of the 

 head, after which it becomes shorter and sparser and dies out but is replaced 

 on the top third or quarter by a number of short black dense postocular 

 bristles ; absolute back of the head yellowish grey ; vertex greyish black and 

 bearing some minute black bristles behind the ocelli, but light grey and bare 

 on the elongated front part ; frons rather darkened at its upper point, quite 

 bare. Proboscis orange, slightly browned and bearing some short thin pale 

 hairs beneath ; palpi orange (rarely darkened at the extreme base), slightly 

 drooping, and bearing all over rather long yellow or greyish yellow pubescence, 

 though a black hair or two may occur out on the middle part of the upper 

 side, or there may be (as mentioned below) a few black hairs at the tip. Eyes 

 touching for less than half the distance between the occiput and the antennae; 

 facets apparently all equal. Antennae brownish black on the two basal joints, 

 though the second joint may be ferruginous ; the two basal joints are both 

 short, and bear some very short black dorsal bristles ; third joint orange, 

 shorter than either of the two basal joints on the upper side (where some 

 minute black bristles occur about tlie base) but dropped slightly kidney- 

 shaped below its tip, and bearing at its outermost part the upturned dull 

 blackish arista, which is nearly three times as long as the antennae. 



Thorax dull light greyish or yellowish brown with usually some faint 

 indications of darker or lighter brown stripes of which the middle one may be 

 split, but variations of colour are mentioned later on ; _ humeri usually dull 

 orange, and the underside of the postalar calli and the ridge extendingto the 

 scutellum less distinctly so ; the triangular space below the humeri is also 

 dull orange, while a dull orange line runs along the dorso- pleural suture to the 

 wing-l3ase, and another triangular space occurs just under the wing from 

 which a narroAV orange line runs down the suture behind the mesopleurae ; 

 pro thorax sometimes greyish orange ; the metapleurai and adjacent parts are 

 also more or less obscure dull orange ; prothorax and metapleura^ bearing 

 fairly long and dense yellow or brownish yellow pubescence ; mesopleurtE with 

 a few exceedingly tiny black or yellow bristles near the upper margin or upper 

 hind angle. Pubescence on the disc of the thorax composed of numerous 

 equally distributed (except on quite the front part) short black bristles._ but 

 these bristles become longer about the sides and the hind part, and sometimes 

 some pale hairs occur on the hind part. Scutellum dull orange with a slightly 

 blackened base ; pubescence distinctly longer than on the thorax but still 

 rigid, usually all black but occasionally with a few pale hairs. 



Abdomen slightly shining orange, with a row of isolated (vide varieties 

 later on) black rounded or diamond-shaped dorsal spots ; one spot occurs on 



