20 



W. LlLLJEBORG, 



This being premised we proceed to give an account of such spe- 

 cies of the sub-family Lysianassina as belong to our Fauna, describing 

 somewhat more in detail those which are new to science or even additions 

 to our own Fauna. 



Gen. LYSIANASSA H. M. Edwards. 



Pedes trunci s. thoracici hmi paris manu subcheliformi carentes, ungue 

 non flexibili, segment o 6:to sive manu apicem versus attenuate ibidemque basi 

 unguis vix crassiore. Mandibulae tubercido molari minimo. Laminae exte- 

 rior es maxillipedtim margine interior e noduloso vel laeviusculo. 



We have in Sweden and Norway only 3 species of that genus di- 

 stinguishable in the following manner. 



Lysiaiiassa. i fissum. ( pectinatim plicatae ... 1. spinicornis (A. Boeck). 



Segment™ Lamina 



° branchiales . . . .' 



7:mum caudae ... I ,. . ~ , r ,,. fT7 - .. . 



j ^ non plicatse 2. Vahli (Kroyer). 



J non fissum, margine posteriore con- 



' vexo 3. Costce, M. Edwards. 



1. L. Spinicornis (A. BOECK). 



lchnopus spinicornis, A. BoECK: Forhandl. ved de Skand. Naturfrs 8:de 



Mode, 1860, pag. 645. 



Antennae longse, inferiores superioribus longiores. Segmenta 2:dum 

 et 3:tium pedunculi antennarum superiorum brcvissima, et segmentum l:mum 

 ejusdem pedunculi ad apicem infra aculeo armatum. Flagellum harum an- 

 tennarum maris circit. 85 — 100, et feminse circit. 60 — 66 articulis brevibus 

 compositum, articulo l:mo ultimis duobus articulis pedunculi conjunctis lon- 

 giore, et intus circit. 23 paribus faseiculorum pilorum transversis prsedito. 

 Flagellum appendicular e longum, articulis circ. 10. Flagellum antennarum 

 inferiorum articulis circ. 80 — 120. 



Mandibular acie obliqua, utrinque denticulo obsoleto munita, processu 

 accessorio carentes. Tuberculurn molare parvum, reflexum, acuminatum et 

 pilosum. Palpus magnus, segmento 2:do latiusculo, et 3:tio arcuato et ad 

 latus alterum pectinatim aculeato. Maxillae l:mi paris ramo exteriore valido, 

 ad apicem aculeis magnis, ex parte pectinatis, et pilis armato ; ramo inte- 

 riore minore apice pilos duos gerente; et palpo biarticulato , apice truncato, 

 striato et aculeato. Maxillae 2:di paris ramis angustis et ad apicem acu- 

 leatis. Pedes maxillares sive maxillipedes laminis interioribus brevibus ad 



