58 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol.. XXVIII. 



taken in Indiana and the District of Columbia on a Histerid beetle, 

 JToloh'ptd. ^Iri/lxfhrnnis includes a number of larg'e tropical Gama- 

 sids, recognized l)y their hirge size and toothed hind femora. One 

 species, M. fornhniu^ Banks, has been taken in Florida. Anteirno- 

 pJiorus has a very short, broad body, with short, stout legs. The first 

 species was found in Europe abunchuitiy attached to certain ants, and 

 its habits have been studied by Wasmann and Janet. One species, 

 ^1. //7/ct/t/'/ ^^'asmann, has oeen recorded, from the United States on 

 ants. Mairoclit^rx includes some of our most common species, ))ut 

 thev have not been described, except one (J/, moagtus Banks) which 



Fig. 105.— L.elaps mexicants, mandible, and en- 

 larged HAIR. 



Fig. 104.— Sejus quadripilis. 



occurs in the nest of an ant, 



J^asl n.H ainerican us. Liroasi)i)< 



is a strange form found in the 



northern part of the country. 



Several species of La^Iaps have 



been described, one from the 



nest of an ant, another, L. pJa- 



ddus Banks, from wet sphagnum moss. Of Gamasus we have a 



number of species tliat occur among fallen leaves, on the ground, in 



rul)l)ish, etc. The genus Ilieinoyitniasus is found on moles and in 



their nests, both in Europe and America. All stages are found at the 



same time, and evidently suck lilood from the mole. I have taken 



one species in the United States. The other genera tabulated are 



known in Europe, and several others have been described from South 



America. 



Berlese has recently divided La^laj)s into several genera, one of 

 them, 3fyr7nonyssvs, from forms on ants. Ribaga has also divided 

 Seiulds or St'iifs into four subp-enera. 



