AMERICAN COLEOPTERA. 129 



224. AcANTHOciNus (Graphisiirus) pusillus Kirby. Length of body 4} lines. 

 A single specimen taken in the journey from New York to Cumberland House. 

 This species is one of the most minute of the Capricorn tribes. Body linear, 

 black, but covered with a coat of whitish decumbent hairs, which appears 

 more or less sprinkled with black dots. Head longitudinally channeled; an- 

 tennae mutilated in the specimen but those joints that remain are white at the 

 base; prothorax short, armed on each side towards the base with a short sharp 

 spine, punctured with scattered punctures; elytra punctured especially to- 

 wards the base, mottled and speckled with brown, with an oblique band a little 

 beyond the middle, apex of the elytra rounded; podex and hypopygium, or 

 last dorsal and ventral segments of the abdomen elongated, so as to defend 

 the base of the ovipositor which is exserted, causing the insect to appear 

 as if it had a tail; the hypopygium is emarginate; thighs much incrassated 

 at the apex. 



The size of the above described insect, the armature of the thorax, 

 the oblique mark posteriorly, and the entire apices of the elytra and 

 the ovipositor exserted, are all characters to which but one species in 

 our fauna responds, Liopus higuttatus Lee, and this would have been 

 referred to its correct position had Dr. Leconte known the female. 



Accepting this as Kirby's type of the genus, the other species 

 must be known by a new generic name and Lacordaire's description 

 must be taken to apply to the latter. 



In brief Graphisurus is in all respects a Lepturges in which the 

 lateral spine of the thorax is at a distance from the base, sharp and 

 recurved, the elytra with sparsely placed erect hairs, and the female 

 with an ovipositor about one-third the length of the body. 



The antennae are ciliate beneath, the pro- and mesosternum narrow 

 and the first joint of hind tarsus elongate. In the male the antennae 

 are fully twice the length of the body, joints 3 — 7 equal in length, 

 8 — 11 gradually increasing, while in the female the antenuce are 

 one and a half times the length of the body, the joints 3 — 11 

 equal in length. The male femora are also more clavate than in 

 the female. 



In the other two species until now included in Graphisurus, the 

 antennae are but little longer than the body in either sex and with 

 few cilioe on the first and third joints beneath, the joints 3 — 11 

 gradually decreasing in length as in Leptostylus, and from the com- 

 parative feebleness of the thoracic spine I consider these as forming 

 a genus in this group parallel with Leptostylus, while Graphisurus is 

 the parallel of Lepturges, in the Liopi. 



G. pusillus Kby., Fauna Boreali-Americana iv, p. 169; bigutlatus (Liopus) 

 Lee. Journ. Acad. 1852, ii, p. 172. 



Occurs from Canada to Pennsylvania, not common. 



TRA.NS. AMER. ENT. SOC. VIII. (17) MAY, ISSQ. 



