68 SEREICORNIA. 



17. Agrilus nodifrons. 



Supra seneo-cupreus, subtus cupreus ; fronte profunde incisa ; thorace confertim sat fortiter vermiculoso- 

 strigoso, disco in longitudinem profunde late impresso ; elytris obsolete griseo-maculatis, ad apicem paullo 

 divarieatis, denticulatis. 



Long. 5 1 lin. 



Hah. Mexico, Etla (Salle); Nicaragua, Chontales (Belt). 



The head is concave above, deeply incised anteriorly, the incision having a hori- 

 zontally compressed node on each side, only visible when viewed from above. The 

 thorax has the deep longitudinal impression more finely strigose than the rest of the 

 surface ; on the ridges between the striae on the raised parts of the disc some fine 

 punctures may be seen here and there. The elytra are asperate-punctate ; there is a 

 deep impression at the extreme base within the shoulder ; the subcosta is well marked 

 and smooth, but it disappears at some distance from the apex ; the extreme apex has 

 a very narrow coppery border. The prosternum is finely rugose in front ; shining and 

 coarsely punctured posteriorly. The metasternum is clothed with pale yellow pubes- 

 cence. The metathoracic episterna are smooth and shining at their base. The 

 abdomen is smooth and shining, very delicately and sparingly punctured ; the sides of 

 the basal segment are moderately strongly vermiculate-punctate ; the next segment 

 has a large triangular spot of pale yellow pubescence at the side ; the lateral carina of 

 the basal segment is slightly angulated behind the middle. 



18. Agrilus discoidalis. (Tab. v. figg. 7, 7 a.) 



Elongatus, parum nitidus, brunneo-seneus, capite cuprascente, elytrorum apice purpureo-cupreo ; thoracis disco 

 sat fortiter punctato, transversim ruguloso, medio excavato, lateribus flavo-pubescentibus ; elytris con- 

 fertim rugoso-punctatis, apicem versus lsevioribus, subcosta nitida, parcius subtilius punctulata, prope 

 suturam vitta integra pube aurea ornatis. 



Long. 6| lin. 



Ilab. Mexico (Brit. Mus.). 



Viewed from above, the head is moderately triangularly emarginate in front ; the 

 face is closely and moderately strongly punctured, impressed in the middle with a 

 golden pubescent stripe down the centre. The thorax has a very large oblong-ovate 

 deep median impression appearing nearly one third the width of the thorax, and the 

 impression is as closely and strongly punctured and rugulose as the rest of the disc ; 

 the posterior ridge is short, slightly curved, obtuse, punctured, not conspicuous when 

 viewed from above. The elytra have a stripe of golden pubescence extending from the 

 base to the apex, just inside the costa ; the surface between this stripe and the suture 

 is rather strongly rugulose for two thirds the length of the elytra, then it is finely 

 punctured ; the sides are also rugulose, except towards the apex. The prosternum is 

 strongly punctured, the intervals between the punctures very unequal, so that some 

 of the punctures are close together and others more widely separated. The middle of 



