l^O [September^ 



described below have mostly been procured in my travels in the Southern States ; 

 a few are from California, but the distribution of this genus in the western and 

 northern parts of the continent appears to be very limited. The new Cephennium 

 is an interesting addition to our fauna. The new genus Brathinus must, I think, 

 be considered as the American representative of Mastigus of the old world. 

 Eutheia is not yet discovered on this continent, nor have we any form which 

 corresponds to it. Our three genera may be easily distinguished follows: 



A. Palpi maxillaries articulo ultimo minutissimo. 

 Palpi labiales articulo primo elongate, mandibulae 



apice emarginatae (thorax amplus) . . Cephennium Miill. 

 Palpi labiales articulo primo brevissimo, mandibu- 

 lae acuminatae (thorax parvus) . . . Scydm^nus Latr. 



B. Palpi maxillares filiformes, articulo ultimo longiore Bra.thinus Lee. 



Cephennium Miiller. 



Megaloderus Steph. Tyttosoma Wesmael. 



1. C. corporosum, piceum flavo-pubescens, thorace angulis posticis subex- 

 planatis, elytris vix punctulatis basi foveatis, striolaque externa notatis,pedibus 

 antennisque testaceis, his articulis tribus ultimis maioribus. Long. -035. 



New York, under stones in April very rare. Blackish piceous, sparsely clothed 

 with fine yellow hair. Head small, smooth ; antennae testaceous, half as long as 

 the body, 9th joint one half thicker than the 8th, rounded, a little transverse, 10th 

 still larger, subtransverse, 11th longer than the 10th and obtuse. Thorax very 

 transverse, sides parallel behind the middle, much rounded anteriorly, posterior 

 angles rectangular, a little flattened. Elytra scarcely narrower than the thorax, 

 convex, finely and sparsely punctulate, base impressed with a deep stria near the 

 humerus, extending one-third the length of the elytra, and a large fovea half way 

 between the stria and scutellum. Anus and feet bright testaceous, thighs not 

 clavate. 



ScYDM^NUs Latr. 



I have adapted Schaum's division of the genus to our native species without 

 alteration, as it appears scarcely susceptible of any improvement ; for convenience 

 I have divided the group (B) differently, as several European forms in it are want- 

 ing in this country. 



1. Palpi maxillares articulo 4to subulate. 



A. Collum thoraci immersum, thorax cordatus, antennae sensim incrassatae ; 

 mesosternum parum carinatum. Sp. 1 6. 



B. Collum thoraci non immersum ; thorax subquadratus, antennae extus subito, 

 vel subsubito incrassatae. 



a. Antennae articulis quatuor incrassatia. 



a. Thorax trapezoideus, cum elytris angulum non formans. Sp. 7 14. 



,g. Thorax antrorsum subangustatus, cum elytris angulum formans. 



Sp. 1520. 



b. Antennae articulis tribus incrassatis. Sp. 21 15. 



c. Antennae feminae gradatim incrassatae, maris irregulares. Sp. 26. 

 2. (C.) Palpi maxillares articulo 4to obtuse, conice, indistincto. Sp. 27. 



A. 



1. S. subpenctatufl, piceus, parce pubescens, vertice bifoveato, thorace 

 ante basin transversim impresso, lateribus foveato, celeopteris rufo-piceis, ob- 

 longo-ovalibus, parce punctulatis, pedibus rufo-piceis. Long. -065. 



