1862.] 



O-Q 



2 



Thorax convex, rouuded on the sides, broader than long, bright rufous 

 above, paler beneath, regularly and distinctly punctured. Scutellum black. 

 Elytra rufo-testaceous ; a large black mark on the disk occupying more than 

 half the superficies, suddenly dilated posteriorly, but not quite Fig. 2. 

 reaching the lateral margin or apex of the elytra, its anterior out- 

 line is suddenly contracted to the suture above the middle and 

 extends upwards to the scutellum and from thence across, covering 

 the humerus (see Fig. 2); deeply and closely punctured, the punc- 

 tures becoming larger towards the base; tip rounded, unarmed. 

 Abdomen rufo-testaceous. Postpectus black. Legs black, clothed with 

 pale hairs which are longer on the posterior pair. Length 4 lines. 



This beautiful little insect was collected by Mr. John Pearsall, on a 

 flower, near Fort Benton on the upper Missouri. It is closely allied to 

 C. puIcheUus Lee, but is quite distinct by its color; the punctation of 

 the elytra is closer and more distinct and the sides of the thorax are round- 

 ed and not angulated. 



1 will here state that in the four specimens of C. palcheUm Lee, in the 

 collection of the Society, there seems to be some variation in the mark- 

 ings of the sexes. In the two % specimens the thorax is entirely black 

 above and beneath and the first and second segments of the abdomen are 

 blackish. In the two 9 specimens the sides of the thorax beneath are 

 yellowish and also all the segments of the abdomen. In one 9 the later- 

 al outline of the large spot on the elyti-a is dilated posteriorly, as in pul- 

 chrior; in the other three specimens it continues straight to the tip. 



Clytus (Rhopai.omerus) araneiformis (Oliv.). 



A specimen of this pretty insect was captured on a wood-wharf in 

 Philadelphia, by Mr. J. D. Dowling, and presented by him to Fig. ?,. 

 the Society. Olivier described and figured it (Ent. 4, 61, No. 70, 

 PI. 7, fig. 90) as coming from St. Domingo, and never having 

 heard before of its occurrence in the Uuited States, I propose 

 here to give a detailed description of it and a figure to convey 

 a better idea of the markings of the elytron, as represented in 

 the specimen before me ; the figure given by Olivier being poor- 

 ly executed, does not show the markings of the elytra correctly. 



Black ; head finely punctured, covered with whitish pubescence which 

 is parted on the front between the eyes; mouth rufous, mandibles tipped 



