DOLICHOPUS. 73 



the length of the tibiae ; three first joints stalk-like and very slen- 

 der ; from the tip of the first joint black-brown ; first joint some- 

 what longer than the second and third taken together ; the third 

 only half as long as the second ; fourth joint very short, somewhat 

 broader than the previous one, brownish-black ; fifth joint black, 

 nearly as long as the second, flattened, very much enlarged, so 

 that it has'an almost semi-obcordate shape ; the close black pubes- 

 cence of its upper edge makes it appear still larger and broader. 

 Middle tarsi from the tip of the second joint black. Hind tarsi 

 entirely black. Wings gray, towards the fore margin more gray- 

 ish-brown, narrow ; towards the base the hind margin has two 

 very remarkable sinuses, a longer one between the fifth and sixth 

 longitudinal veins, and a shorter one behind the sixth longitudinal 

 vein, so that there is a lobe between them ; the anal angle of the 

 wing also projects considerably as a rounded lobe ; the fourth lon- 

 gitudinal vein only with a slight flexure, somewhat more converg- 

 ing towards its end with the third than is the case in the related 

 species ; the costa at the tip of the first longitudinal vein with 

 a rather imperceptible swelling. 



Nab. English River. (Kennicott.) 



Observation. I believe I know also the 9 of this species. It 

 differs from the 9 of D. discifer, by its somewhat larger size, its 

 somewhat more yellowish face, and by the fore tarsi being not only 

 shorter, but also tinged with black already from the tip of the first 

 joint. The fore coxae have, upon the greater part of their anterior 

 side, some minute black hairs. Although the fore coxae of the 9 

 have in many species a more extended black pubescence than the 

 g , the difference between this 9 and the above described J 1 is 

 more striking than usual. This circumstance will render it some- 

 what doubtful that the two sexes really belong together, until a 

 positive observation settles the question. 



41. I>. setosus LOEW. $. Viridis, nitidus, facie et inferioribus ocu- 

 lorum ciliis albis, antennis tegularumque ciliis nigris, coxis aiiticis 

 pedibusque flavis, tarsis anterioribus inde ab articuli primi apice tar- 

 sisque posticis totis cum tibiarum posticarum apice nigris ; femora pos- 

 tica pilis flavis ciliata ; tibiae posticae setis longis armatse, alarum vena 

 longitudinalis quarta non fracta. 



Green, shining ; the face and the cilia of the inferior orbit white ; the 

 antennae and the cilia of the tegulse black ; fore coxae and feet yellow, 

 the four anterior tarsi from the tip of the first joint and the whole hind 



