122 HOMOTYPHUS. 



ated ; the basal and second joints are conical, attenuated at their 

 base, dilated gradually towards their apex : the third is shorter, sub- 

 circular, and deeply bilobed ; from its base proceeds the terminal 

 joint, which is broadly inflated into a globular projection covering 

 entirely the apical claw. 



This genus is remarkable on account of its close alliance (with the 

 single important exception of the form of the maxillary palpi) with 

 Omototus : the few points of structural difference that present them- 

 selves prima facie are too few (although, so far as I can ascertain, 

 constant) to allow, of themselves, this genus to be established sepa- 

 rately. The rather more parallel and oblong outline, and a slight 

 variation that can be traced in the form of the tarsi and apex of the 

 posterior tibia;, are not sufficient, alone, to warrant the formation of 

 a new genus ; when, however, to these constant but comparatively 

 slight variations is added the very pronounced contrast of form in the 

 maxillary palpi, there can be no longer any doubt that the two 

 groups are really abundantly separate from each other. In the genus 

 before us, the maxillary palpi are cylindrical, not dilated at the apex, 

 and in general outline filiform : in Omototus, on the other hand, the 

 maxillary palpi are broadly incrassated ; the breadth of the penulti- 

 mate joint exceeds its length, and considerably exceeds the breadth 

 of the apical joints. Without, however, a careful examination of the 

 labial, and, especially, the maxillary palpi, it will be impossible with 

 certainty to distinguish between the two genera : in (/aural features 

 they are absolutely identical. 



1. Homotyphus lacunosus. (Fkont. fig. 6.) 



H. subovatus, rotundatus, robustus, favo-pubescens, ferrugineus ; 

 capite brevi, inter oculos transverse foveolato, granulato ; thorace 

 transverso, brevi, ad basin oblique depresso, ad apicem medium 

 longitudinaliter impresso, granulato ; elytris latis, robustis, for- 

 titer punctato-striatis, ad medium transversi depressis, etiamque 

 ad basin; antennis brevibus, ad apicem dilatatis, ferrugineis, art. 

 6-8 nigro-fuscis ; pedibus subpubescentibus, flavis. 



Long. corp. 2f lin., lat. If lin. 



Subovate, rotundate, robust, flavo-pubescent, dark ferrugineous. 

 Head very short, depressed, not produced in front: eyes distant, slightly 

 prominent, situate at an appreciable distance from the base : antennae 

 at their insertion approximate ; above the insertion of the antennas 

 and between the eyes is an obsolete shallow depression in the form 

 of the letter T : surface below the insertion of the antennae flavous, 

 at the base coarsely granulated, ferrugineous, while at the inner 



