﻿272 LE CONTE.— SYNOPSIS OF THE 



B. Spuria. 



25. D. corvina, oblongo-ovalis, convexa, piceo-nigra nitida, capite confertissime punctato, clypeo mar- 

 ginato, rotundato, sutura frontali impressa, thorace latitudine plus duplo breviore, fortius sat dense 

 punctato, lateribus rotundatis, parcius ciliatis, angulis posticis obtusis rotundatis, elytris seriatim punc- 

 tatis, vix tricostatis, punctis internis solis confusis, antennis palpisque piceo-rufis, unguibus fissis. Long. 

 •44. 



One specimen, Fort Yuma, Colorado Kiver, California. This insect has the appear- 

 ance of a large Aphodius. The spaces of the elytra which represent the costse are 

 marked each with a row of small punctures. The under surface is very coarsely 

 punctured, and the punctures have short yellowish hairs. The pygidium is very 

 coarsely and the propygidium densely punctured, the latter is transversely elevated, 

 or rather broadly sulcate near the apex. The posterior tibiae at the outer apical 

 angle are armed with three longer spines. 



26. D. p a c a t a , oblongo-ovata convexa, ferrugineo-picea, nitida, capite confertim punctato, clypeo subrotun- 

 dato, marginato, sutura frontali impressa, vertice vage bifoveato, thorace sat dense punctato, antrorsum angus- 

 tato, lateribus postice cum angulis valde rotundatis, elytris fortiter seriatim punctatis, punctis internis 

 solis confusis : tibiis anticis tridentatis, tarsis anticis anteanis palpisque rufis, unguibus dente ad medium 

 armatis. Long. '32. 



One specimen found by Dr. Thomas H. Webb, of the United States and Mexican 

 Boundary Commission, in the valley of the Gila. The form is that of most Diplo- 

 taxis, but the spiracles of the propygidium are prominent as in the last species. The 

 mandibles are less prominent than usual, and in fact hardly visible. The propygi- 

 dium and pygidium are sculptured as in the preceding ; the tooth of the claws is per- 

 pendicular, and not large. 



C. Spur ice. 



27. D. b r e v i d e n s , oblonga, convexa, fusco-ferruginea nitida, capite confertim fortius punctato, subrotun- 



dato, clypeo marginato, antice subemarginato, clypeo frontali profunda, thorace fortius punctato, lateribus 

 antice obliquis, dein rotundatis, angulis posticis valde obtusis, utrinque ad apicem et ad medium foveato 

 elytris grossius seriatim punctatis, punctis internis solis confusis, tibiis anticis valde tridentatis, ungui- 

 culis medio fortiter dentatis. Long. .42- 



One specimen found by Dr. Thos. H. Webb in the valley of the Gila. This species 

 repeats the form of the fifth division, as the next does the second of the genuine 

 Diplotaxes. The mandibles are more prominent than usual, and bent downwards, 

 so that the ligula is covered by them. The pygidium and propygidium are very 

 coarsely punctured, and the latter has the usual transverse impression near the apex. 

 The apical foveas of the thorax are half way between the middle line and the angles, 

 the others are near the side, and at the greatest breadth. 



28. D. H a y d e n i i , oblonga-ovata, rufo-ferruginea, nitida, convexa, capite sat dense punctato, qlypeo 

 fere hemihexagono marginato, sutura frontali profunda, front© transversim obsolete elevata, thorace 



