NORTH AMERICAN COLEOPTERA. 11 



Juxta-sutural groove entire. 



Antennje with second joint alone small Hicroi'hagii!^. 



Antennse with joints two and three moniliform. 



Entoiiioi>litlialiiin!>». 



10. — Posterior coxal plates parallel or wider externally 11. 



Posterior coxal plates narrower externally 12. 



11. — Antennae slender, filiform. 



Third joint not longer than second Xylobins. 



Third joint much longer than second Hj'loHiares. 



Antennae bi-serrate J, or bi-pectinate % Sarpeclon. 



12. — Mandibles stout, rugose 13. 



Mandibles slender, not rugose 14. 



13. — Last ventral segment prolonged in a point Xeniafodes. 



Last ventral segment obtuse at tip H.ypoeoelus. 



14. — Prosternal sutures straight; lateral margin of thorax distinct 15. 



Prosternal sutures arcuate; lateral margin almost obliterated 17. 



15. — Clypeus very deeply sinuate each side SfliizopliiliiS. 



Clypeus regularly arcuate in front 16. 



16. — Coxal plates suddenly broader internally; last four joints of antennae 



abruptly longer Epiplianis. 



Coxal plates gradually broader internally. 



Last three joints of antennae abruptly longer PKlegOii. 



Outer joints of antennae shorter C'ryptostoiiia. 



17. — Clypeus arcuate in front ; coxal plates abrujitly wider at inner third ; an- 

 tenna with joints 4-10 moniliform Aiielastes. 



DENDROCHARIS Guerin. 



Form cylindrical, rather robust ; antennae rather short, first joint moderately 

 elongate, second very short, third longer, joints four to ten strongly dentate, 

 eleventh oval, acute ; head large, deeply inserted, eyes slightly emarginate ; cly- 

 peus very little narrowed at base ; prothorax wider than long, lateral marginal 

 line entire ; prosternal sutures straight, propleural triangle wider than long, with 

 a deep and well defined gi-oove to receive the antennae along its outer border ; 

 mctasternum with an oblique groove on each side beginning at the posterior 

 margin of the middle coxae directed obliquely backward and to the outer side ; 

 episterna distinctly wider behind, the epimera not visible ; posterior coxal plates 

 broader externally ; legs moderately robust, the tibiae broader toward the tip ; 

 posterior tarsi shorter than the tibia, the first joint small, equal to the second, 

 joints 2-3-4 each with a rather long membranous lobe beneath, the fourth not 

 dilated nor enlarged, last joint as long as the preceding three; claws slightly 

 broader at base. 



Regarding this geniigi Bonvouloir very ju.stly remarks that it pre- 

 sents so many strange characters that it is difficult to a.ssign it a place. 

 In the genera Gastraulacus and Temnillus the same metasternal 

 grooves are observed, but the structure of the tarsi is similar to that 

 of Agastocerus and Galba. A certain relationship also with Dro- 

 mjBolus must not be lost sight of. 



