52 SEREICORNIA. 



which, as is commonly the case, is a little more conspicuous at the sides of the thorax, 

 and is thinner at the sides of the elytra. The head has a longitudinal impressed line 

 in front ; all the upper part is covered with tortuous ruga?. The thorax is covered 

 with closely placed ruga?, which are much curved at the front part ; at the posterior 

 angles there is an indistinct ridge, nearly straight, but very slightly directed inwards. 

 The elytra are somewhat coarsely asperate ; the suture behind the middle is a little 

 raised, and at this part the surface on each side of it is shining and nearly smooth. 

 The prosternum is densely and finely punctured. The abdomen is moderately closely 

 and finely punctured. The lateral carina of the basal segment is distinctly angulated 

 rather behind the middle. 



3. Paradomorphus ruginosus. 



Convexus, crassus, sat nitidus, supra cupreus, subtus brunneo-seneus ; capite rugoso, antice medio leviter 

 impresso ; antennis brevibus, nigris ; thorace rotundato-convexo, forfciter rugiuoso, lateribus medio 

 foveola impressis ; elytris subdepressis, basi asperatis, postice punctatis, maculis quatuor pallide flavis 

 ornatis, ad apicem parum attenuatis, vix serrulatis. 



Long. 3^ lin. 



Hab. Mexico, Ventanas in Durango (Il'dge). 



This is a well-marked species, owing to its very convex thorax, which is covered 

 with irregular much-raised rugse, the intervals shining and very delicately punctured. 

 The elytra are impressed at the suture — the impression twice interrupted by obtuse, 

 transverse, slightly-raised ridges — between the two conspicuous spots, one of which is 

 placed at the middle, the other at one quarter from the apex. The prosternal chin- 

 piece* is gently emarginate. The prosternum is strongly and rather closely punctured ; 

 the intercoxal process is rather flat, parallel, truncate posteriorly. The metasternum is 

 coarsely punctured, with an elongate central puncture. The abdomen is rather strongly 

 and somewhat closely punctured, with a conspicuous yellowish-white spot at the side 

 of the second segment. The lateral carina of the basal segment has a small, nearly 

 semicircular emargination in the middle, filled above with yellow pubescence. The 

 whole of the underside is sparsely clothed with short pale pubescence. 



4. Paradomorphus collaris. 



Convexus, crassus, sat nitidus, purpurascenti-cupreus ; capite rugoso, medio longitudinaliter impresso ; tborace 

 rotundato-convexo, fortiter ruginoso, pube aureo-flava dense vestito (margine antico calvo), basi trans- 

 versim impressa; elytris fortiter crebre rugulosis, maculis aureo-flavis ornatis, ad apicem arcuatim 

 attenuatis. 



Long. 3| lin. 



Hab. Mexico (Salle). 



The head has a little yellow pubescence just above the clypeus. The elytra have no 

 subcosta, but they are impressed near the apex ; each has a small yellow spot at the 

 suture not far from the base, a transverse spot at the middle, and a somewhat broad 



* See p. 58. 



