10 PROCEEDINGS OP THE ACADEMY OF 



P. HAYDENIANUS. 



P. olivaceo-castaneus ; antennis modicis, sparse pilosis, ultimis nigris ; lami- 

 nis lateralibus luteis ; appendicibus genitalibus masculis hirsutis et processu 

 lato breve et spinis duobus armatis ; spina terminale modice robusta, valde 

 curvata. 



Judging from an alcholic specimen, the color of this animal is an olive chest- 

 nut, with the fide plates yellowish, and the posterior portions of the scuta 

 much lighter than the anterior. The head is bright chestnut, and is orna- 

 mented with a median furrow on its vertex, and a pair of impressed dots on each 

 side of its face. Its inferior border is medianly moderately emarginate. The 

 margins of the side plates are somewhat thickened. The anal scutum is yel- 

 lowish, small, subtriangular, and distinctly emarginate posteriorly. The feet 

 are very slender, and are shortly pilose. The femora of the hinder ones are 

 armed with a small spine on their distal extremity. The male genital append- 

 ages are small, and are hairy at the base. They are armed with a broad, ob- 

 tuse, spinous process, and a slender curved spine besides the terminal. The 

 latter is robust, and is bent with a double curve, that is anteriorly and lateral- 

 ly. I have dedicated this species to my friend, Dr. Hayden, whose name is 

 inseparably connected with the far West. 

 Hub. Oregon. Museum of the Smithsonian. 



Descriptions of New Species of North American ITJLID2E. 



BY DR. H. C. WOOD, JR. 



Genus IULUS. 



I. VENUSTUS. 



I. rubro-castaneus, linea dorsale nigra et maculae nigra? seriebus lateralibus 

 (interdum obsoletis) ornatus ; antennis longis, filiformibus, pilosis, baud cla- 

 vatis ; scutorum lateribus canalicnlatis ; segmentis 52 ; mucrone parvo. 



The general color of this species is reddish chestnut ; frequently the red 

 predominates so much that the individual is rea^y flesh-colored, but occa- 

 sionally the chestnut overcomes the other tint. The dorsal stripe is generally 

 very distinct, especially on the posterior portion of the scuta. The eyes are 

 triangular, and are connected by a dark band, which is often rather obscure. 

 The anterior cephalic aspect is long and narrow, with its sides converging in- 

 feriorly. Its inferior border is fringed with a double row of short, distant 

 hairs, and is medianly deeply emarginate and 2 4 dentate. The scuta are 

 ornamented, rarely with a white blotch on each side of the mesial line, but 

 generally with two lateral black dots. The first scutum in the female has the 

 anterior margin oblique as to the main axis of the body, and is prolonged 

 laterally so as to form processes, mostly canaliculate, with a rounded border. 

 In the male the anterior margin is at right angles to the axis of the body, and 

 the lateral parallel to it, so that there are no processes. The male genital 

 appendages consist of two main portions on each side. The outer and more 

 conspicuous of these is formed of a thin, very irregular plate, from whose 

 base springs a short, clavate, cylindrical, distally pilose process. The inner 

 portion is composed of a long, very slender, almost setiform process, and a 

 shorter straighter one. The former at its base is bent at right angles to itself ; 

 and distally it is somewhat spirally arched over the other. 



The female genital appendages consist of two broad, robust, pilose processes, 

 with a pair of very slender, almost filiform, feet like bodies, springing from 

 their conjunction and equalling them in length. The major portion of each 

 appendage is composed of a single plate. This is folded on itself, so as to 

 constitute an irregular, flattened cylinder, which is open at its end, and along 



[Jan. 



