Horn.] 31^ [June 20, 



apical margin and sides is a slight fossa from wliicli extends posteriorly 

 a sliort stria, within which especially in front is a punctured space. The 

 figure given by Marseul is very characteristic. 



The type of this species was kindly loaned by M. Chevrolat, through 

 the intervention of M. Aug. Salle. 



No special locality for its occurrence is known ; probably Texas. 



S. rugipennis, Mars. Mon., 1855, p. 417, pi. 16, fig. 51. 



Oval moderately convex, piceous, shining. Head sparsely punctured, 

 supra-orbital stria entire, extending on the sides of the epistoma. 

 Thorax with a narrow space of coarse punctures along the lateral mar- 

 gin, a few punctures at the sides of the base and a slight ante-scutellar 

 impression. Elytra at apex densely strigoso-punctate and opaque, pu^nc- 

 tured space terminating abruptly in front, extending along the space 

 between the first and second striie by sparse punctures to base and also 

 to the extreme margin at the apex ; external subhumeral stria indistinct, 

 internal moderately long, oblique humeral finely impressed ; first dorsal 

 short feebly impressed, second extending nearly to middle, third entirely 

 obliterated except a rudiment at base, fourth dorsal as long as the second 

 arching at base, joining the sutural which is entire. Propygidium and 

 pygidium moderately densely and coarsely punctured. Prosternum 

 horizontal, striaj convergent and uniting in front. Anterior tibite 5-G 

 denticulate, middle and hind tibiae spinulose. Length .14 inch ; 3..") mm. 



This species at first sight has the aspect of relationship with intiosus, 

 Lee, but the form of the prosternum and the arrangement of the striaa 

 absolutely forbid any such reference. The group is, as at present con- 

 stituted, rather heterogeneous in aspect and might be divided into those 

 species with the prosternum not narrowed in front by the prosternal 

 fossse, and those in which it is so narrowed, although such a course is at 

 present unnecessary. 



The unique before me (the type) was kindly loaned by Marseul, and is 

 said to be from America. I introduce it in our fauna, that attention may 

 be directed to it as its general aspect is that of a southern California 

 species. 



Group III. 



Prosternum transversely convex, longitudinally very feebly sinuous 

 anteriorly truncate, striie entirely wanting. Front not margined. 



S. interstitialis, Lee. Ann. Lye. V., p. 166. 



Oblong, piceous black, surface with slight bronze lustre. Head densely 

 punctured, supra-orbital stria wanting. Thorax with the disc nearly 

 smooth, at base narrowly, and at apex and with a broad space punctured, 

 punctures denser at the margins and gradually finer toward the centre. 

 First dorsal stria of elytra extending to middle, 2-3-4 sub-equal and 

 longer, the third stria double, fourth dorsal broadly arching at base and 

 joining the sutural which is nearly entire, internal subhumeral obsolete. 



