26i [November, 1906. 



this swelling the first thin vein comes off in a very bold curve and 

 then runs straight to the margin ; no bristle at the base of the second 

 thick vein ; armature of hind tibiae as in mordellaria. 



2^ mm.— femorata, Mg. 



55 (54) Hind legs long and slender. 



56 (57) Hind tibi% toithout a spine. 



S ? . Thorax, abdomen and halteres deep black ; frons rather 

 broad and glossy ; palpi small and narrow, yellowish or rusty, and 

 nearly bare ; third joint of antennae very large and prolonged into a 

 point ; wings diaphanous, with the thin veins very indistinct, second 

 thick vein robust, curved, and with a conspicuous bristle at its base, 

 first thin vein comes off without a curve some way from the tip of the 

 thick vein, and runs in a straight line to the margin ; hind tarsi very 

 long, the length of the metatarsi being about three-fourths that of 

 the tibiae, occasionally a very tender spine or bristle is present about the 

 middle of the hind tibiae. If mm. — citreiformis , Beck, 



57 (56) Hind tibiae with two spines on the outer side, in the first and second thirds 



respectively. 



S ? . Frons broad and dull ; palpi of the male black, fringed 

 with numerous strong stubby bristles, of the female more yellowish 

 and with the ordinary long bristles ; third antennal joint of male 

 moderately large and lemon-shaped, of the female rather small and 

 round ; second thick vein slender and usually straight, and with a 

 conspicuous basal bristle, first thin vein comes off close to the tip of 

 the thick vein, and runs in a gentle and uniform curve to the margin ; 

 hind tarsi not excessively long, the metatarsi being about one half the 

 length of the tibiae ; in all other respects like citreiformis. 



1^ mm. — vitripennis, Mg. 



The 3-veined species are probably all of them autumnal, making 

 their appearance again in the spring, and occasionally waking up in 

 the interval if the weather is mild. They seem without exception to 

 be scarce, unless perennis be an exception, which Mr. Verrall met 

 with rather freely in Sussex years ago, the date of one of his males 

 which I have seen being 28.1.68. 



Of palposa.yviih its extraordinary palpi, I have seen only a single 

 male, taken 29.10.03 by sw^eeping in Stoke Wood, nor do I know of 

 its occurrence elsewhere. 



Opaca (nigricornis) is represented in my collection by one male 

 and two females, the dates and localities being — ^ ., Stoke Wood, 

 9.4.06, ? ? , Stoke Wood, 22.4.02, and Ashperton Park, 5.4.05. 

 Through the kindness of Mr. Wingate I have been able to examine 

 the male from Bishop Auckland {vide p. Ill), besides three more of 

 the same sex from Bonhill, Dumbartonshire, which were amongst an 

 interesting lot of Phoridce sent me by Mr. Malloch. With the 



