1852.] 145 



One specimen, Missouri Territory. Much smaller and broader than S. fascia- 

 turn, piceous black, finely pubescent, thorax black in the middle, margin testa- 

 ceous and diaphanous at the sides and apex ; base sinuated. Elytra not wider 

 than the thorax, finely not very densely punctulate, marked with a yellow lunate 

 spot behind the middle ; apex broadly rounded, margined with yellow, which 

 extends a short distance along the sides. Body beneath black, feet dark 

 piceous. 



7. S. decolor, ellipticum, rufo-piceum, subtiliter pubescens, thorace 

 pallidiore medio obscuro, elytris subtiliter punctulatis, pedibus flavis. Long. '03. 



Two specimens, San Jose, California. Elliptical, rufo-piceous, finely pubes- 

 cent. Thorax paler, diaphanous at the sides, dark in the middle, almost semi- 

 circular, slightly sinuate at the base. Elytra very finely punctulate, rounded at 

 the apex. Body beneath piceous, abdomen paler ; feet yellowish. 



8. S. m i s e 1 1 u m , latius ellipticum. rufo-piceum, valde punctulatum, 

 brevissime pubescens, thorace valde marginato, medio obscuro, pedibus testaceis. 

 Long. '03. 



Two specimens. New York. Broader than most of the preceding species, very 

 slightly clothed with extremely short hair, entirely rufo-piceous, and strongly 

 punctulate. Thorax semicircular, strongly margined, paler than the elytra, 

 diaphanous at the sides, darker in the middle, base finely margined, scarcely 

 sinuate. Elytra broadly rounded at the apex; body beneath rufo-piceous, feet 

 testaceous. 



9. S. scitulum, late ellipticum, nigrum, subtilissime pubescens, tho- 

 race flavo, puncto antico obscuro, elytris subtiliter punctulatis, fascia postica 

 lata, margine apicali pedibusque flavis. Long. "025. 



Colorado River, California. Smaller than the others, and more broadly oval, 

 very finely pubescent. Thorax yellow, semicircular, with a dark spot near the 

 anterior margin. Elytra black, very finely punctulate, with a broad testaceous 

 fascia behind the middle, scarcely reaching the sides, apex rounded, narrowly 

 margined with yellow. Body beneath black ; abdomen testaceous, feet yellow. 



Description of a New Species o/ Trombiditjm. 

 By John L. Le Conte, M. D. 



T. magnificum, ovatum, postice angustatum et obtusum, densissime 

 miniato-velutinum, pedibus subaequalibus, rostro conico, apice obtuso. Long. 

 32, lat. -23. 



Texas, Dr. S. W. Woodhouse. This fine species is remarkable for its great 

 size, being equal toT. tinctorium. It belongs however to a different 

 division of the genus, the eyes being placed immediately above the first pair of 

 legs. The rostrum is conical, and obtuse at the apex. The palpi are conical, 

 more than three times as long as the rostrum, thick at the base ; the terminal 

 hook is longer than the penultimate joint, and is glabrous only at the apex ; the 

 inferior appendage is a little longer than the hook, and very pilose, it appears 

 rounded at the extremity. The feet are two-thirds the length of the body, the 

 first and fourth pairs a little longer than the intermediate ones. 



The body is soft, somewhat trapezoidal, narrowed and obtusely rounded 

 behind, less rounded in front, with the sides slightly sinuous in the middle. The 

 color is dark cinereous, above and beneath covered with very fine fur which is 

 of a bright vermillion color, becoming gray at the base of the legs. In the best 

 preserved specimens, the upper surface is irregularly impressed, resembling the 

 convolutions of the brain. 



