AMERICAN COLEOPTEtlA. 327 



eleven-joiuted with a three-jointed, not compact club. The relative 

 length of the abdominal segments is that of the Monotomidae, but 

 a similar structure is very closely approximated in Nitidulidae. The 

 anterior coxae are here open behind but widely closed in all known 

 Monotomidse, although this character varies in the Nitidulidae. In 

 view of the divergences and aflSnities above shown the weight seems 

 to me more in favor of the Nitidulidae than the Monotomidae. 

 One species only is known. 



S. palinicola Lee. — Elongate, rufo-testaceous,sparselypubesceiit, minutely 

 punctulate above and beneath but more evidently on the thorax. Thorax a 

 little wider than long, slightly narrowed in front, apex truncate, base feebly 

 arcuate, sides straight. Elytra a little wider than the thorax, a little longer 

 than the head and thorax together, sides very feebly arcuate, apices truncate. 

 Pygidium moderately coarsely punctate. Length .04 inch; 1mm.; varying a 

 little more and less. (PL III, fig. 1, with details.) 



The elytra have often a darker cloud at tip and base. 



The last ventral segment S is truncate, and the additional dorsal 

 segment visible. 



Occurs in Florida, on the Palmetto. 



RHIZOPHAGINI. 



Labrum visible at the tip of the epistoma but connate with it. 

 Mandibles simple at tip. Maxillae with two lobes, the outer slender 

 not capitate. Antennae ten-jointed, club of two joints, the tenth partly 

 enclosed; antennal grooves short, convergent. Prosternum not pro- 

 longed at tip. x\nterior coxal cavities closed behind. Mesosternum 

 horizontal. Intercoxal process triangular, acute. Abdomen with the 

 first and fifth segments long, the intermediate three short, equal. 

 Elytra truncate, pygidium exposed. Tarsi feebly dilated, heteromerous 

 in the males, peutamerous in the females. Claws simple. 



The males in addition to the tarsal character have an additional 

 segment and the head usually larger. 



The ten-jointed antennae distinguish this tribe from the others. 

 In the aggregate of their organization there is an approach toward 

 the Trogositidae from which the structure of the tarsi alone dis- 

 tinguishes them. In the present tribe the first tarsal joint is as long 

 or a little longer than the second, while in the Trogositidre the first 

 joint is small. By its bilobed maxillae Rhizophagus approaches the 

 Brachypterini on the one hand and Trogositidae on the other; the 

 large additional segment of the male and the structure of the abdomen 

 with the first and last joints short are Carpophilide, while the form of 

 the head and connate labrum are Ipide. The tribe seelns therefore 



