276 LEPTID.E 



under L. florentina must be excluded. Amongst the closely allied species must come 

 L. cingidata Loew from Central Europe, but I believe tbat it may be satisfactorily 

 distinguished by its browner wings and legs. L. striola Meigen according to the 

 type is only L. tringaria with a dull dark orange stigma, rather blackened coxae on 

 which there are no black bristles, and palpi entirely pale haired. L. ejihippiitm 

 Zetterstedt is in ray opinion only a still paler form of the variety vanellus. 1 

 consequently consider the true synonymy to be, 



L. TRINGARIA L. 



solivaga Harris 

 derelicta Harris 

 monotroinis Harris 

 vermileo Schrnk. 

 scolopacea var. DeG. 

 var. vanelhis Fahr. 

 ? rufa Scoj). 

 reconditus Harris 

 simplex Meig, 

 ephippium, Zett. 



striola Meig. 

 var. punctata Ltv. 



jnlosa (laps, cal.) Strohl 



Goehelii Strohl 

 var. nigriventris Lw. 



conspicua Wing. 

 Pandellei Gob. 

 Perezii Gob. 

 Perrisii Gob. 

 Cartereaui Gob. 



Linne's description must be accepted traditionally, just as tradition gives vermileo 

 Schrank as a synonym. 



4. L. nigriventris Loew. Allied to L. tringaria but much darker 

 on especially the abdomen both dorsally and ventrally. 



A species or variety belonging to the group of L. tringaria, 

 being rather large and with immaculate wings, but by far the 

 darkest form in that group. 



cj . Thorax (compared with L. tringaria) sometimes darker greyish brown with 

 but little yellowish tinge ; humeri lighter grey or the same colour as the 

 thorax ; postalar calli with a greyish sheen on their prominences but not 

 ferruginous beneath ; pleurae (including the metapleura;) slaty grey, darker 

 than in L. tringaria, and the prothorax either the same colour as the pleurae 

 or with a slight ferruginous tinge • pubescence on the dorsum all black, with 

 seldom any pale hairs intermixed about the hindmargin. Scutellum shining 

 blackish with more or less translucent brownish hue on the large apical part 

 and in some lights on the disc, but with a greyish tinge when seen from quite 

 in front, and with only black pubescence. 



Abdomen in the darkest specimens black and but little shining, with 

 slight brownish reflections in some lights, and in the next darkest specimens 

 with the hindmargins of the first five segments distinctly but often very 

 narrowly brownish orange but of the sixth segment only slightly so, and 

 then these hindmargins are each nearly equal all across and are widest on 

 the third and fourth segments to about one-tenth or even one-sixth of the 

 segment, but do not extend to the side quarters or thereabouts ; pubescence 

 all black, fairly long on the sides of the five basal segments ; belly shining 

 brownish black in the darkest specimens, but in the next shade with each 

 hindmargin rather sharply yellow up to at any rate the fifth segment but in- 

 distinctly so on the last three hindmargins ; pubescence all black in the 

 darkest specimens but generally pale to a large extent on the disc of the 

 second segment and to a small extent on the third segment. In paler 

 specimens the abdomen has dark orange dorsal markings, so that the hind- 

 margin of the basal segment is orange, while the second and third segments 

 are orange with a large diamond-shaped black spot on each which extends 

 to the front margin but not to the hind margin and which is connected across 

 near the middle of the segment with the broad ])lack sidemargins ; the 

 fourth segment has its last quarter dark orange but not extended to the 

 sides, and the fifth segment has a less distinct orange hindmargin ; belly 

 rather yellow on the disc of the basal segment. In a still paler specimen 



