the Coleopterous family Passalidw. 463 



D. ciiTvilineatus appears to be allied to D. haroldi, Kuw., 

 but is smaller, the labrum is distinctly emarginate in front 

 and the sides of the prothorax are punctured from the 

 front to the hind angles. 



Didyymis congoensis, sp. n. 



Modice elongatus, depressus, capite ubique parum profunde 

 varioloso-punctato, clypeo valde 4-dentato, medio minute bi-tuber- 

 culato, carinis frontalibus antice leviter, deinde acute, convergenti- 

 bus, cornu frontale obtuso, postice globoso, sulcato, cum tuberculis 

 lateralibus minute punctulatis ; protboracis lateribns antice et 

 postice grosse punctatis, ubique arcuatis, angulis anticis acutis ; 

 scutello impunctato ; elytris profunde striatis, striis dorsalibus vix 

 perspicue punctatis, lateralibus latis, crebre scalariforme punctatis, 

 interstitiis lateralibus angustis ; metasterni postice medio et lateribus 

 sat crebre et grosse punctatis, abdominis lateribus segmentoque 

 ultimo toto subtilissime punctato-rugosis. 



Long. 26-28 mm. 



Hab. Congo, Mayanda ; Angola, San Salvador. 



This nearly resembles the preceding species, of which 

 it has the size and form ; but the elytra are more strongly 

 sculptured laterally, with narrower longitudinal and trans- 

 verse ridges. The head is punctured all over, the punctures 

 being fine upon the elevated parts and large and round in 

 the depressions. The punctures upon the posterior part 

 of the metasternum, but at the middle and in the angles, 

 are closer and more numerous. Tlie last abdominal 

 segment is finely punctured all over, but less closely at 

 the middle. 



In most respects the species agrees with D. latro, Kuw., 

 but the lateral sculpture of the elytra is stronger and the 

 transverse fold upon the last abdominal segment of that 

 insect is absent. 



Didymus Imvisternus, sp. n. 



Modice depressus, capite punctato-rugoso, postice nitido, clypeo 

 fortiter 4-dentato, medio minute emarginato, carinis frontalibus 

 arcuatis, post medium tuberculatis, baud angulatis, angulo apicale 

 fere recto, cornu obtiiso, lato, vix sulcato ; protboracis lateribus 

 ubique baud crebre punctatis, arcuatis, angulis anticis fere rectis ; 

 scutello impunctato ; elytris profunde striatis, striis dorsalibus 



