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XVI. Contributions to a Knowledge of European Trichop- 

 tera. {First Part) . By Robert Mc Lachlan, 

 F.L.S., Sec. Ent. Soc. 



[Read 2nd November 1868.] 



Under the above title I propose to publish, from time to 

 time, as occasion may require, descriptions of new 

 genera and species of European Trichopterous insects, 

 with notes on synonymy and local distribution, &c., 

 combining therewith synopses of difficult genera, and 

 elucidatory figures. To this last mentioned feature of 

 these contributions I attach especial importance, as an 

 outline sketch explains readily where words fail to give 

 an intelligible idea of the distinguishing characters. A 

 description of a new Caddis-fly without an explanatory 

 figure loses half its value. 



The present paper contains descriptions of, or notes on, 

 species of the following genera : — 



Fam. Pheyganid^ Gen. Neuroma. 



LiMNEPHiLiDJG 8te7iophylax. 



Halesus. 

 Seeicostomid^ Sericostoma. 



Oligoplectruin. 

 LEPTOCEEiDiE Molamiodes. 



Setodes. 

 Hydeopsychid^ Arctopsyche, n. g. 



Dolophilus, n. g. 

 RHYACOPHiLiDiE Rhyacophila. 



PHRYGANID^. 



Neueonia Stalii, n. sp. 



In size and form similar to N. reticidata, but with 

 almost the colour of N. ruficrus. Dull black. Antemim 

 brownish-black. Protliorax with a few orange-coloured 

 hairs. Wings shining blackish fuscous with a violaceous 

 tinge ; veins black and strong : in the anterior ivings the 

 costal margin (costal and sub-costal areas) is alternately 

 marked with dull yellowish and darker fuscous spots; a 

 white dot at the thyridium ; these wings are perhaps 

 rather broader than in JV". reticulata, but the difference in 

 form is very slight. Legs brownish-black ; the posterior 

 tibiae, except at the base, dull ochreous ; spurs testaceous. 



TEANS. ENT. SOC. 1868. PAET IV. (DECEMBER) . 



