358 DR. H. J. HANSEN ON THE 



B. Posterior margin of Jast abdominal segment never emar- 



ginate, but conspicuously convex or nearly straight ; 



movable spines, if present, rather small and distant 



from each other. Epimera of second to fourth thoracic 



segments either not produced or with exceedingly small 



processes. 



«. Posterior margin of last abdominal segment at least 



half as long as the breadth of the segment (at each 



end with a prominent tooth but without marginal 



spines). Processes of epimera of sixth segment 



moderately short, about as large as those of seventh 



epimera 2. £. Grimaldii, DoUf. 



b. Posterior margin of last abdominal segment con- 

 siderably less than half as long as the breadth of 

 the segment. Processes of epimera of sixth segment 

 either wanting or much longer than those of seventh 

 epimera. 

 a. Epimera of sixth segment with moderate or rather 

 large processes, 

 t Process from clj^peus small, s^en vertically from 

 below covering a minute part of the space be- 

 tween the mandibular palps. Epimera of fifth 

 segment with a conspicuous process. Posterior 

 margin of abdomen without movable spines, at 

 each end with a conspicuous tooth, and just 

 outside this (in large animals) a minute pro- 

 trading angle 3. jE. truncata, Norm. 



ft Process from clypeus large, seen vertically from 

 below covering the whole space between the 

 mandibular palps. Epimera of fifth segment 

 without any process. Posterior margin of 

 abdomen with four movable spines, but without 

 any distinct tooth at the end. ... A. E. pulchra, Leach. 

 ^. Epimera of sixth segment with exceedingly small 

 processes or without any process at all. 

 t Process from clypeus of considerable size, seen 

 vertically from below covering the major portion 

 of the space between the mandibular palps. 

 Posterior margin of last abdominal segment 

 slightly longer than one-third of the breadth of 

 the segment, with four marginal spines. 



5. E. affinis, n. sp. 

 tt Process from clypeus very small, seen vertically 

 from below covering a minute portion of the 

 space between the mandibular palps. Posterior 

 margin of abdomen very short, even less than 

 one-fourth as long as the breadth of the seg- 

 ment, without marginal spines. 6. E. inermisy H. J. H. 



