CHIROXOMUS. 193 



Gkoiip 2. 



Hydrohcenus, Fries, Kongl. Vet. Acad. Handl. 1829. 176. Psilocerus, 

 Ruthe, Isis, 1831. 1207. 



This group only contains the following species, which inhabits 

 several parts of North Europe, but has not yet been certainly 

 found in Britain. 



188.* lugubris, "Fries, Kongl. Vet. Acad. Handl. 1829. 176 (1829). 

 — oceultans, j\Ieig. ; Euthe ; Zett. Ater, opacus, alis nigricantibus, 

 pedibns piceis. Long. |- lin. 



Group 3. 



189. lacustris, Hal. Westw. Class II. Syn. Gen. Brit. Ins. 12.5 

 (1840). Prasinus, mesonoti vittis tribus et pectore carneis, alis albidis 

 nudis, tibiis anticis fuscis. Long, mm 2, fceni. \\\ alar. 3 lin. 



Light grass-green. Palpi dusky, except the base. Three confluent 

 stripes on the mesonotura and the raesosternum (flesh-colour or) ferru- 

 ginous, also the inesothorax, dusky at the tip. Wings whitish-hyaline, 

 naked ; veins light yellowish. Ilalteres pale. Fore tibife and fore 

 tarsi, except the base, dusky ; posterior tarsi dusky only towards the 

 end ; first joint of fore tarsi twice as long as the tilna in the female, 

 more elongated in the male ; fifth joint not half as long as the fourth. 

 Male. Antennas twelve-jointed, dingy yellow, with yellowish plumes ; 

 last joint much longer than the rest together. Fem. Antennas seven- 

 jointed ; the last joint dusky, linear, one-third of the length of the en- 

 tire antenna. 



Found by Mr. Haliday by Loch Fad (Bute), Lough Neagb, 

 and Lough Dirg. (S. I.) 



Group 4. 



Biamesa, Meig. Zw. vii. 12 (1838); Zett.; Stasg. 



190. obscurimanus, Meig. Zw. vi. 248. 88 (1830). Foem. ob- 

 scure teataceus, palpis antennisf[ue nigris, thorace vittis tribus piceis, alis 

 cinereis, venis halteribusrpie albidis, illis apud discum nigris, abdominis 

 segmentis testaceo-marginatis, pedibus fulvis, tarsis nigris. Long. 3 ; 

 alar. 6 bn. 



Fern. Dark testaceous, shining. Palpi and antenna! black, the latter 

 seven-jointed, testaceous at the base. Thorax with three piceous stripes, 

 the middle one subdivided. Wings grey ; costal, radial, and cubital 

 veins, and prfebrachial transverse veinlet black, the rest whitish ; pobra- 

 chial areoh'l cloned before the fork of the pohrachial xiein (as in Tanypns 

 pnHctipennis, etc.). Ilalteres whitish. Abdomen black ; hind borders of 

 the segments testaceous. Legs tawny, rather stout, minutely pubescent ; 



* Since the Synopsis, p. 152-154, was printed, the species niiiiibcrcd 1 SS has been 

 asccrtiiiiied to belong to the genus Corynoneura. 



VOL. IV. 2 (; 



