690 OFVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR, 1871. 



Mas. — Cephalothoraw c:a 1^ millim. longus, laevis, nitidissimus, 

 margine reflexo dentibus acutis, inaequalibus, majoribus .quam in E. 

 longipalpi, sub-procurvis, densis serrato; parte cephalica, ut in illa, 

 depressione a parte thoracica distincta, modice elevata, a latere visa 

 leviter arcuata et posteriora versus declivi. Mandibular ovatse, extus 

 angulatae, serie dentium acutorum in dorso versus latus exterius, 

 dentibus sulci unguicularis longis, acutis. Palpi testacei, partis tibialis 

 apice et bulbo fuscis; pars femoralis leviter ^-^-formis, subter ordini- 

 bus duabus dentium fortium, versus apicem internodii descrescentium, 

 armata, quorum niaximi longitudine diametrum ipsius internodii fere 

 tequant; femora quoque l:mi paris serie dentium ejusmodi subter, 

 a basi secundum § vel f longitudinis, armata. Pars patellaris pa- 

 tella l:mi paris triplo longior, dimidiam partem femoralem (et tar- 

 sum pedum l:mi paris) longitudine superans, gracilis, ipso apice 

 parum incrassata ibique subter in procursura longissimum, deorsum 

 et paullo anteriora versus directum, ipsa parte patellari graciliorem, 

 sensim angustatum et acuminatum, introrsum curvatum et parte 

 tibiali paullo longiorem producta. Pars tibialis parte patellari di- 

 midio fere brevior, apice dilatato et compresso; supra paullo ante 

 ipsum apicem in dentem crassum, erectum, sub-triangulum elevata; 

 subter in procursum fortem, porrectum, inermem, paullo sursum 

 curvatum et sub-acuminatum productus est apex, denteque ad basin 

 hujus procursus in latere interiore munitus. Bulbus e latere visus 

 tres eminentias vel dentes ostendit: unum, ad apicem, magis por- 

 rectum, reliquos duos deorsum directos; duo anteriores obtusi, po- 

 sticus magis acuminatus. 



In femina margo cephalothoracis subtilissime spinulosus est; 

 mandibular in dorso seriem granulorum minutissimorum tantum ha- 

 bent. Femora antica subter seriem granulorum minutorum, suum 

 quidque pilum gerentium ostendit. Vulva ex lamina versus apicem 

 clariore, satis crassa, convexa, antice angustiore, postice angulis ro- 

 tundatis truncata constat: margo ejus posticus in medio retusus vel 

 emarginatus est et in tuberculum parvum elevatus, quod postice 

 impressionem minutam fere semi-circulatam exbibet. — Präeterea fere 

 omnino cum 9 E- longipalpis (Sund.), Westr. congruere videtur l ). 



1 ) Till samma grupp af slägtet Erigone, som E. longipalpis (SuNrh), E. atra 

 Blackw., E. dentipalpis (Reuss), och E. psychrophila N., hör äfven Micry- 

 phantes arcticus White (Sutherland, Journal etc, II, Append., p. ccx, figg. 

 11, 12): den är möjligen identisk med Dagou af dem, dock icke med E. 

 psychrophila, så vida man kan fästa något afseende vid det dåliga träsnitt 

 (fig. 12), som föreställer hanen. Beskrifningen af denna Erigone arctica 

 (.White) har följande lydelse: 



»The cephalothorax is somewhat depressed behind, and rather attenuated 

 and elevated in front, ending abruptly above the chelicera. The eyes, which 

 are eight in nnmber, are placed on the most elevated parts of the cephalo- 

 thorax; there are four in the middle, the two front ones being placed doser 

 to each other than the posterior pair; the two eyes on each side are close 

 together, the hindmost is rather remoter than its Deighbour from either of 



