138 EMPLOYE. 



Black, dull. Wings clouded ; veins and halteres brown. Posterior 

 tibiae bristly. 



Bare. Inhabits the sea-coast. (E. I.) 



3. incana, Hal. MSS. Canescens, facie et palpis albicantibus, alls 

 albis, abdomine nudo, pedibus fuscis. Long. -| ; alar. 1 lin. 



Hoary. Face and palpi whitish. Antennae with the second and 

 third joints of equal length ; fourth a little longer than all the preceding. 

 Thorax with a thin and very fine pubescence. Wings white:, veins 

 yellowish. Halteres pale, with brown tips. Abdomen bare. Legs 

 brown ; tibiae with a few hairs towards the tips. 



Rare. On sandy coasts of the sea and of lakes. In Mr. Ha- 

 liday^s collection. (I.) 



4. arenaria, Hal. e. in. i. 161 (1833). brevipennis, Ztt. Nigra, 

 antennis nigris, alls brevissimis fuscis ad costam albidis, pedibus piceis. 

 Long, ^-f ; alar. J lin. 



Male and Fern. Body black, not shining. Proboscis black. Palpi 

 brown. Antennae black ; third joint nearly round, not longer than the 

 second ; fourth full twice the length of all the preceding. Things ru- 

 dimentary, brown, whitish along the hind border ; veins black ; second 

 longitudinal vein a little nearer to the third than to the first ; third and 

 fourth almost parallel ; fifth slightly inclined to the hind border. Legs 

 pitchy, stout. 



Local, but very abundant on some parts of the sea-coast in the 

 autumn. (E. I.) 



5. speculifera, Hal. MSS. Cana, facie alba, antennis basi palpis 

 pedibusque totis flavis, pleuris macula rotunda atra nitida supra coxas 

 medias, alis hyalinis. Long. 1 ; alar. 2-f lin. 



Hoary. Face of the head white. Eyes very minutely pubescent. 

 Palpi yellow. Antennae yellow at the base ; third joint almost oval, as 

 if triannulated ; fourth joint long, setiform, on the tip of the third. 

 Thorax with a few scattered hairs. Pleurae with a black round shining 

 spot above the middle coxae. Wings colourless ; veins very pale. Hal- 

 teres pale, with brown tips. Legs yellow, pubescent, with a few scat- 

 tered hairs ; hind tibiae furnished with some longer hairs. 



Very rare. In Mr. Halida/s collection. (I.) 



Genus XXI. TACHYDROMIA. 



TACHYDROMIA, Mq. d. n. (1827) ; Ct. Tachydromia p., Fb. ; Fin. ; 

 Mg. Musca p., L. ; Fb. Calobata p., Fb. Sicus p., LI. Tachypeza, 

 Mg. ; Ztt. 



Corpus minutum, elongatum, glabrum. Color niger, nitidus ; pictura 

 alarum interdum fusco-fasciata. Oculi fusci, aeneo-micantes, in 

 utroque sexu supra paullo disjuncti, infra conjunct!. Proboscis 



