12. LASIOPOGON 727 



on the basal half ; the front tibicB have a Ijrownish furry covering on the 

 anterior (inner) two-thirds, while the hind tibite bear on that part a clothing 

 of very dense very short black bristles. Bristles all l)lack, practically absent 

 on the front femora though a few postero-dorsal hairs after the middle are 

 strong ; front tibia- with about eight inconspicuous dorsal bristles extending 

 over nearly all the length, about four well separated long posterior bristles 

 on the middle half, and about three long postero-ventral bristly hairs, besides 

 the apical circlet of bristles ; front tarsi with each of the four basal joints 

 bearing an apical circlet of four long bristles but no others except the short 

 plantar ones, while the last joint has a thin bristle above each claw as long as 

 the joint itself in addition to other weaker and shorter lateral bristly hairs ; 

 middle femora sometimes (but not always) with two erect short antero- 

 dorsal bristles soon after the middle ; middle tibiae with about three strong 

 antero-dorsal, three weak postero-dorsal or almost dorsal after the middle, 

 and three long postero-ventral at and after the middle, in addition to the 

 apical circlet, but the distinction between bristles and long hairs is very 

 slight ; middle tarsi with bristles similar to those on the front pair ; hind 

 femora with about six (5-10) widely separated anterior bristles of which the 

 end ones become antero-dorsal, and with some small subapical (including 

 two antero-dorsal) ; hind tibiae with three strong antero-dorsal bristles, about 

 four weaker postero-dorsal (almost dorsal), and three antero-ventral on the 

 apical half, in addition to the apical circlet ; hind tarsi with bristles similar 

 to those on the other pairs. Pulvilli yellowish white ; claws black, but dull 

 dark reddish on the basal half. 



Wings with an equal though slight blackish grey tinge, and with the veins 

 strongly blackish or very dark brown even to the base, but with no trace of 

 clouding on the cross-veins. Squamae (alar) dull yellow with thick paler dull 

 yellow margins on which is a slight pale yellow fringe. Halteres pale or dull 

 orange, with the knob sometimes blackened at the tip. 



9 . Very much like the male. Abdomen with the grey hindmargins less defined 

 anteriorly and the basal segment nearly all grey ; eighth segment shining 

 black and flattened but with a fringe of pale pubescence across its hind part ; 

 pubescence erect, black, and rigid all about the sides and sidemargins of the 

 fifth, sixth, and seventh segments, but not on the eighth. Ovipositor with 

 two curved rows (hardly forming a circlet) of about seven stout blunt bristles 

 in each row. 



Length about 9 mm. 



This species has no ally in Britain, but two or three very closely 

 allied species occur on the continent and I believe the distinctions which 

 have been given at present to be very unsatisfactory ; I cannot place 

 any value upon characters founded on the colour and markings on the 

 thorax, or the colour of the pubescence on the abdomen and femora, or even 

 on the face-beard, as British specimens of L. cinetus seem to me to include 

 sufficient variations for all of the described species. I possess a specimen 

 from Kowarz (labelled " Saualp ") under the name of L. Macquarti (which I 

 presume represents the L. montmius of Schiner) and six specimens (which 

 I believe to belong to one species) from Bigot under the name of L. BcUardii 

 in which the claspers are almost hatchet-shaped (the base forming the 

 short side) with the upper side extending up to a point which is the 

 only place at which they ordinarily meet, while the lower side ends in a 

 bluntly rounded angle, and the distance from the sharp angle to the 

 rounded angle is more than that from the latter to the base, so that the 

 clasper is hardly longer than deep; the pubescence on the femora and 

 tibiae is longer and denser than in L. cinetus, but the hind femora bear 

 less obvious bristles and especially conspicuous pale pubescence; the front 

 femora may be slightly stouter; the abdomen has rather long pale 



