1891.1 189 



A single specimen of this interesting new species of Tomoderus, 

 the first of the genus recorded from the Aiistralian continent, has 

 recently been forwarded to me by Mr. J. J. Walker, In the denticulate 

 lateral margins of the thorax it differs from all others of the genus 

 yet described ; but parallel forms are known in the genus Anthicus, e.g., 

 A. spinicoUis, A. cBqiiinoctialis, La Ferte, &c. The species is allied to 

 T. compressicoUis, Motsch. ; but it is very much smaller and narrower 

 than that insect, and has the elytra! punctuation much finer, closer, 

 and less regularly arranged. T. hrcvicoUis, La Ferte, from India, 

 appears to be still more nearly allied, but, to judge from the descrip- 

 tion, has the thorax formed as in T. compressicoUis ; T. vinctus, Er., 

 from Tasmania, differs in numerous particulars from T. denticoUis. 



Mectnotaesus tenuipes, n. sp. 

 Moderately elongate, testaceous ; the elytra piceous, with the sides towards 

 tlic base broadly and indeterminately, and a large rounded spot on each at the apex 

 (confluent with the one on the opposite elytron at the suture), testaceous ; the upper- 

 surface thickly clothed with very fine, silky, appressed, whitish pubescence, the 

 prothorax with a few very long hairs at the sides and beneath the horn. Head 

 densely and minutely punctured, flattened between the eyes, the latter black ; an- 

 tennae entirely testaceous, exceedingly long and slender, filiform, extending fully to 

 the apex of the elytra ; prothorax transversely convex, strongly and abruptly con- 

 stricted at the sides behind, and with a shallow transverse groove across the disc just 

 lu'forc the base, the surface densely and minutely punctured (the punctuation quite 

 liidden by the pubescence) — the horn long and broad, furnished with seven strong 

 teeth on either side, and with a broad projecting piece at the apex, the crest 

 moderately raised and sharply margined on either side, the margin serrate, the 

 surface of the crest and horn coarsely punctured, the crest without median carina ; 

 elytra convex, truncate at tlie base, widest at the middle, and slightly narrowing an- 

 teriorly, the sides subparallel in front, the shoulders broadly rounded, the surface 

 with fine, deep, scattered punctures, the punctures subserially arranged towards the 

 base and becoming very much finer towards the apex, the interspaces with an ex- 

 ceedingly minute punctuation (only visible under a very strong lens) ; legs pale 

 testaceous, exceedingly long and slender, the tibial spurs long, 



Length (from tip of thoracic horn to end of the elytra) 2^, breadth g, mm. 



Hah. : Japan, Urasa, between Niigata and Nikko, 

 One specimen, captured by Mr G. Lewis on September 19th, 

 1881. This very distinct species may be at once known by its ex- 

 ceedingly long and slender legs and antennae. It is the second 

 recorded Mecynotarsus from Japan. 



11, Caldervale Road, Clapham, S.W. : 

 May Uh, 1891. 



