Vol. xxixj ENTOMOLOGICAL NEWS 303 



New Inter-Tidal Rock-Dwelling Coleoptera from 



California. 



By Edwin C. Van Dyke, Berkeley, California. 



Here and there along our Pacific Coast are to be found 

 certain rocks which are so situated that they are submerged 

 by the high tides. These harbor many types of true sea ani- 

 mals, but in their crevices, often such articulates as mites, 

 chilopods, pseudo-scorpions. Thysanura and Coleoptera. It 

 is a most interesting fauna and one to which I have given 

 some little time, during recent years. As a result, I have 

 secured, among other things, three new species of Coleoptera. 

 The descriptions of these are now presented. 



Carabidae. 

 THALASSOTRECHUS n. gen. 

 Body somewhat elongate, flattened, and moderately robust. 

 The head large, not constricted behind the eyes, with shallow 

 frontal grooves, and two supraorbital setae. The antennae 

 moderately stout, arising under a feeble frontal ridge, the 

 third joint slightly longer than the second, the first and second 

 glabrous, the second and third shining and with few hairs, the 

 following quite hairy, subopaque, and gradually increasing in 

 width towards apex. Eyes moderate in size and well removed 

 beneath from the mouth. Clypeus moderately prolonged and 

 with a setigerous puncture each side. Labrum short, broadly 

 emarginate, plurisetose in front. Mandibles prominent, prog- 

 nathous, feebly arcuate, acute at tip, and with a small setiger- 

 ous puncture at apex of scrobe. Maxillae slender, acute at 

 tip. ciliate with a few stiff hairs on inner side, the outer lobe 

 biarticulate, palpi of moderate length, the terminal joint gradu- 

 ally tapering, not subulate, slightly longer than preceding, and 

 finely truncate at tip, the penultimate not hairy. Submentuni 

 broad, its basal suture distinct, deeply emarginate and with 

 a broad bifid tooth at middle, the epilobes dentiform, ligula 

 moderately prominent, truncate and bisetose at apex, the para- 

 glossae slender and very little longer than the ligula and not 

 ciliate within, the palpi of moderate size, the last joint fusi- 



