10 Mr. G. A. K. Marshall—^ Synoptic 



tinguished from TanyrrhyncJius hj its lateral scrobes, the 

 internal denticulation of the intermediate tibiaj, the absence 

 of a femoral tooth, the strong curvature of the scape at its 

 apex, the much greater width of the episterna of the meta- 

 sterimm, &c. In the structure of its mouth-parts, as well 

 as in many other characters, Stramia shows considerable 

 affinity with Hipiyorrhinus, and I see no reason for altering 

 my previous suggestion that it should be associated with 

 that genus. For similar reasons the nearly allied genus 

 8olenorrh{nus^^c\.\h.,m\xs,t also be removed into Lacordaire's 

 Hipporrhinides. 



With the removal of these two elements the mouth-parts 

 of the genera of Tanyrrhynchinaj become sufficiently homo- 

 geneous in character. From what has been said above with 

 regard to the mentum it is clear that they cannot be regarded 

 as true Phanerognathi, and owing to the comparatively large 

 size of that organ, in relation to the buccal cavity, it seems 

 preferable to regard them as slightly transitional Adelognathi. 

 From all of these latter, with the exception of tlie very 

 distinct Brachycerinse, they may be distinguished by a 

 combination of two characters, viz. : the comparatively 

 slender and prominent mandibles, and the absence of a 

 mandibular scar; and these have probably been developed 

 correlatively with the greater elongation of the rostrum, 

 which also characterizes the group as compared with normal 

 adelognaths. But here again there are signs of transition. 

 In Tanyrrh. strigirostris, Sparrm., T. squah'dus, Boh., and 

 (what I take to be) T. loripes, Boh., there are faint indications 

 of mandibular scars; but owing to their ill-detined character 

 and outwardly oblique position, it seems improbable that 

 they can really serve as supports for temporary false man- 

 dibles. They are perhaps mere rudiments indicating that the 

 Tanyrrhynchinse have comparatively recently diverged from 

 the Otiorrhynchidse, in the sense of Leconte and Horn. This 

 is borne out by the apparent affinities which can be traced 

 between Aosseterus i\.xid Piazomias (Tanymecides), Symjnezc- 

 rrhynchus and Ellimenistes (Oosomides), and Tanyrrhynclius 

 and Eremnus (Eremnides). 



In many of the genera the position of the eyes is abnormal. 

 In SynajnocephaluSy Myorrhinus, Anathresa, and some Ilapto- 

 rnerus they are more or less closely approximated on the 

 forehead; but in Stereorrhynchus, IJmzila, Malosomus, 

 Opseorrhinus, Atmesia, Eiqyhab'a, and some Haptomerus 

 they are situated considerably further forward, so as to be 

 placed on what would normally be considered as the basal 

 part of the rostrum. In the great majority of species the 



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