HOMAMMATUS. 117 



Palpi labiales Jill formes. 



Antennae approximates, ad apicem dilatatm ant subdilatatce. 



Caput p>lus minus attenuatum, antice productum, verticale. 



Thorax transversus (subquadratus), antice rotundatus. 



Elytra robusta, lata, abbreviata, ante medium transverse depressa. 



Pedes : tibia} anteriores ad apicem subincrassato? ; tarsi, art. 2 nd " mi- 

 nuto ; tibia} postieaz longitudinaliter marginatw, et ad marginem 

 subsinuatOB ; tarsi breves et attenuati, art. l mo et 2 nd " subcequalibus. 



Labrum narrow, transverse. 



Maxillary palpi (Tab. IV. fig. 7 m, fig. 8 m) elongate ; the first 

 joint minute ; the second dilated at the apex ; the third longer and 

 broader than the second, more cylindrical ; the apical joint nearly 

 the length of the second, and attenuate. 



Labial palpi (Tab. IV. fig. In, fig. 8n) fine, elongate, the medial 

 joint being filiform. 



Antennas (Tab. IV. fig. 8 a) approximate, situated below the inner 

 margin of the eyes, robust, medially dilated ; the basal joint is 

 broadly dilated and incurved towards the apex ; the second robust 

 and short ; the third as long as the first, attenuate, especially at the 

 base ; the fourth of the same form as the third, but shorter ; the 

 fifth to the seventh distinctly dilated and short ; the terminal joints 

 less robust and abbreviated. 



Eyes large, globose, situated at the base of the head, extending 

 laterally not so far as the anterior angles of the thorax. 



Head more or less attenuated, produced in front, more distinctly 

 vertical than in any other genus of the group, or (in H. turgidus) 

 subvertical. 



Thorax transverse (almost quadrate) ; the anterior margin 

 rounded ; the sides finely marginate. 



Scutellum triangular, situated somewhat below the plane of the 

 elytra. 



Elytra robust, considerably broader than the thorax, abbreviated, 

 antemedially transversely depressed, punctate or finely punctate- 

 striate. 



Legs : the anterior femora sufficiently robust, subincrassated to- 

 wards the middle. The tibiae (Tab. IV. fig. 7 c) are inflected at their 

 immediate base, and gradually thickened towards the apex, where 

 (below the insertion of the tarsus) they are terminated by two in- 

 curved claws. The tarsi (Tab. IV. fig. 7 d) are short, slightly broader 

 than the base of the tibia ; the first joint is triangular ; the second 

 of the same form as, but rather smaller than, the first ; the third 

 is deeply bilobed, broader, circular : the apical claw is bifid, and 



