Some Hypermetamorphic Beetles n 



(Myodites flavicornis Say and amcricanus Guer. are not placed 

 in this table because of too general descriptions.) 



Rhipiphorus acutipennis n. sp. 1 



Described from one male' Lincoln, Neb., W. D. Pierce, and 

 from six females, July, Pine Ridge, Neb. ; July 16, 1902, July 28, 

 1902 (two), Cams, Neb., W. D. Pierce; July, 1897, July 23, 

 1895, Grand Rapids, Mich., R. H. Wolcott. One of each sex in 

 the author's collection ; females in the collection of the University 

 of Nebraska. 



Length 7.5 111111.-9.5 mm. 



See accompanying plate for structure of the prosternum and 

 legs. 



Male. — Body entirely black, elytra yellow with apex black. 

 Vertex slightly concave in front, above ; upper edge acute ; much 

 elevated, very shiny and sparsely punctured. Antennae ochra- 

 ceous. Thorax convex, slightly concave on each side of middle 

 at apex ; posterior angles not produced ; medianly angulate, hardly 

 produced, with apex emarginate, and with semicircular lobe ele- 

 vated just before apex, deeply concave behind; posterior lateral 

 angles and median lobe tinged with rosy color. Elytra con- 

 tinuous for very short distance at base, rapidly narrowing and 

 very acute at tips. Mandibles flattened at base, slightly concave 

 with a rosy tinge; acute at tips, furrowed below. Epistoma 

 long, apically rounded, slightly truncate. Anterior coxae sep- 

 arated in their entire length by a slender prolongation of the 

 prosternum. Second joint of posterior tarsi flattened above, 

 equaling and slightly longer than the third. Spurs of legs rufous, 

 claws yellowish. Body clad with very fine, sparse pubescence. 



Female. — Flagellum of antennae black, scape luteous. Basal 

 third of elytra black. Abdomen telescopic, in nature, last seg- 

 ments often drawn in beyond second segment. 



1 See pi. I, fig. 8. 



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