THE CANADIAN ENTOMOLOGIST. 295 



It is closely allied to T. convexnlus, Lee, a salt- marsh species of the 

 Atlantic coast, which has the same habits, T. decoloratiis, Casey, is the 

 species of this genus next in abundance here, and is likewise minute, being 

 from .06 to .08 inch in length. It inhabits very wet places along streams 

 and swamps. It does not seem to construct galleries, but is sheltered by 

 any kind of debris and the holes made by other mud insects. The most 

 of the individuals have the elytra rufescent, with a dark shade near the 

 base and suture, but occasionally one occurs in which they are piceous. 

 The $ 5 are very well described by Mr. Casey, and his description of 

 T. iiucrius seems to apply quite well to the $ ^ , which have the head 

 parts more developed. Incertiis in that case will, according to custom, 

 be the name of the species. 



T. spretiis, Casey, 



Is found with the preceding, appearing to have the same habits, but 

 is much less abundant. It is piceous, with pale legs, and about .1 r inch in 

 length. 



T. qtiadrifimctatus, Casey (?) Say. 



This species is found with the preceding two. It is much larger than 

 spretiis, and less abundant. Examples of this species may have been 

 formerly distributed as memnoiiiiis from a bought and wrongly named 

 type. 



T. co7igener, Casey, ^ 



Has the habits of the preceding, with which it is found. Only a few 

 examples have yet occurred. It is entirely piceous, about .10 inch in 

 length, and is readily known by the thorax being quite convex, and the 

 dorsal impressions uninterrupted. The foregoing are all the species of 

 this genus detected here as yet, but the exploration can not be considered 

 exhaustive. The collecting and studying of these minute insects in one's 

 local fauna will be found quite fascinating when rightly set about. 



Eleusis nigrelius, Lee. 



Two examples were taken under the bark of maple, June 15th, 

 identical with others from California. 



Siagomun pimctatum, Lee. 



Many examples were taken with the above, and I have it from North 

 Carolina and New Mexico ; it also occurs in Arizona and British 

 Columbia. 



