tlie Coleopterous family Passalidse. 465 



This species is also distinguished by the metasternal 

 plate being quite free from punctures. It is much smaller 

 than the previous insect, but greatly resembles the West 

 African D. parastictus, Imh. In addition to the unpunc- 

 tured metasternal disc, it differs from that species in the 

 rather less acute front angles of the prothorax, the sharply- 

 limited rugose puncturing of the sides of the abdomen, 

 which is confined to definite depressions, the very slight 

 emargination of the last segment and the pilosity of its 

 latter half. 



Didjjmus crassus, sp. n. 



Robustus, sat brevis, modice convesus, capite subtiliter punctato- 

 rugoso, clypeo quadridentato, medio late eraarginato, dentibus jequa- 

 libu?, carinis frontalibus vix arcuatis, post medium angulatis et 

 tuberculatis, cornu mediano obtuso, postice baud lato aut sulcato, 

 tuberculis posticis transverse carinatis ; prothorace Iseve, medio 

 canaliculato, fossis lateralibus minute punctatis, sulco laterale 

 angusto, panic iiunctato, protliorace prreterea impunctato; scutello 

 antice subtiliter pnnctulato, postice impress©; elytris striatis, striis 

 lateralibus leviter punctatis, duabus juxta-suturalibus fortiter im- 

 pressis, tribus intermediis tenuibus ; mesosterno lato, glabro, 

 utrinque fortiter foveolato, lateribus punctatis et hirsutis, metasterni 

 medio et angulis posticis impunctatis, lateribus punctatis et hirsutis ; 

 abdominis segment© ultimo postice depresso et crebre punctato, 

 penultimo omnino polito. 



Long. 34 mm. 



Hah. Uganda, Mount RuAvenzori. 



A single example of this isolated form was found by 

 Mr. Legge. Although agreeing in essential features with 

 Didymvs it has more the aspect of Urionomus. It is 

 large, broad, and little flattened, the head is normal, the 

 prothorax devoid of punctures except for a few minute 

 ones in the lateral scars, and the elytral strias are only 

 slightly punctured, the three exterior dorsal ones being 

 much feebler than the rest. The sides of the elytra are 

 naked, but there are a few hairs at the anterior face. The 

 sides of the meso- and metasternum are hairy, and the 

 latter is without punctures either at the middle or the 

 hind angles. 



Eiimelosomus ajims, sp. n. 

 E. sansibarico, Har., proxime affinis, sed metasterni angulis posticis 

 parce punctatis abdomineque fere omnino polito : sat convexus. 



