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short as in T. Noivickii (conf. Westeing's description). In T. ex- 

 terna L. Koch 2 the extreme apex of the mandibles on the outer side 

 usually forms a little protuberance or (in the specimens from the 

 south of Europe) a short tooth , which appears not to be case in 

 T. obtusa In 2\ externa L. Koch the eyes appear to be somewhat 

 smaller than in T. obtusa, and the distance between the two ante- 

 rior centre eyes is evidently greater than that between them and the 

 posterior centre eyes, which is hardly, if at all, the case in T. ob- 

 tum. Not only in T. externa L. Koch and T. obtusa, but also in 

 T. Noivickii the distance between the two lateral eyes on the same 

 side seems to me something less than that between the anterior and 

 posterior centre eyes. 



Specimens are however not wanting, which it is difficult to 

 include under either of L. Koch's species, and which even may be 

 considered as belonging to other species as good as those proposed by 

 him. I possess two female specimens (Swedish), which by the colour 

 of the sternum etc. belong to T. Noivickii. but in which the claw 

 of the mandibles has a little blunt tooth or protuberance at the base, 

 as in T. externa L. Koch 5. In a Swedish male specimen in my 

 collection the tooth on the anterior margin of the mandible's claw- 

 furrow, which would correspond to the l:st little tooth (reckoning 

 from the apex) in T. externa L. Koch cf 1 , is absent, though found in 

 other specimens of T. obtum cf. This male forms a sort of transi- 

 tion to two other males (from Skane), which I have received of Mr 

 Gr. Eisen, and which by their dark colour, their uniformly coloured 

 sternum and the absence of a protuberance in front of the spine on 

 the upper side of the mandibles, show, that they cannot belong 

 either to T. Noivickii or T. extensa L. Koch, but which at the same 

 time are without the sharp tooth in front of the spine ou the upper 

 side of the mandibles, that distinguishes T. obtusa tf: the l:st tooth 

 on the anterior margin of the claw-furrow is instead larger than in 

 ordinary specimens of T. obtusa cf and T. extensa L. Koch ,3% and 

 is not quite in a line with the other teeth, but situated something, 

 though but little, higher up towards the upper side of the mandi- 

 ble (not nearly so high as the protuberance in T. extensa L. Koch 

 or the tooth in T. obtusa). This form , which I cannot aggregate 

 to any of L. Koch's species, I call T. dearmata. — In auother adult 

 male, found by Mr Eisen at Harg in Upland, which in colour and 

 marking, especially on the sternum, in size and in the armature of 

 the mandibles most nearly approaches T. Noivickii cf, the mandi- 



