456 Mr. Gilbert J. Arrow's Classification of 



Petrejus archidonx, sp. n. 



Modice convexus, paulo brevis, clypei margine recto, capite postice 

 glabro, cornu angusto, fere recto, hand sulcato, usque ad clypei 

 marginem producto, carinis posterioribus fere parallelis, validis, 

 carinis frontalibus postice transversis, deinde valde arcuatis antice 

 recte j^roductis, spatium triplice latius quam longius, subtiliter 

 granulatum, includentibus, capite postice plane impresso, linea incisa 

 valde arcuata, hujus intra utrumque extremitatem fossa profunda 

 tuberculoque sat j)arvis ; prothorace transverso, sulco medio integro 

 punctisque perpaucis jiosticis lateralibus ; scutello impunctato ; 

 elytris profunde punctato-striatis, convexis, bumeris antice pilis 

 nonnuUis brevissimis ornatis ; metasterni angulis posticis vix 

 punctatis. 



Long. 25 mm. 



Hal. N. Ecuador, Archidona. 



This appears from Perch eron's sufficiently careful 

 description to be very near P. nasutus, Perch., but with a 

 rather different head. In P. archidonfe the clypeus is 

 finely granulated, and has no trace of the large impres- 

 sions characteristic of the other species. The cephalic 

 horn reaches as far forward as the front of the clypeus and 

 is compressed and not channelled. The posterior acces- 

 sory ridges are nearly parallel to it, carinated and separated 

 from the base of the horn by deep grooves. There is a 

 wide flat depression behind these which is bounded by a 

 strongly curved and deeply incised line, at each end of 

 which there is a small tubercle with an impression just 

 behind it. The prothorax is gently curved outwards in 

 front and behind and has its sides nearly straight to 

 beyond the middle. The marginal channel is punctured 

 and not dilated in front and there are a few large punc- 

 tures in front of the lateral impressions. The scutellum is 

 smooth and the elytra strongly punctate- striate. There 

 are two or three punctures on each side of the metasternum 

 behind. 



Petrejus henrici, Rosmini, appears to be very similar to 

 this species, but is smaller, and has the clypeus smooth 

 except for small isolated punctures. 



Petrejus peruvianus, sp. n. 



Convexus, sat elongatus, capite rugoso, clypei margine recto, 

 angulis productis, cornu antice producto, acute, sed sat brevi, postice 



