When the first sheet of the “Guide” was published I had 
not seen Masoreus, and suspected that Harpalus Orfordensis 
of Spence (H. vernalis Duft) might be allied to it; but I am 
now satisfied that this insect ought to terminate the genus, 
Harpalus being nearly related to Zabrus. 
Mr. W. S. MacLeay has described and figured in the “ An- 
nulosa Javanica” the genus iEphnidius, one of the Harpalidas, 
a good deal resembling Masoreus in contour ; but the short- 
ness of the penultimate joint in the external maxillary palpi 
proves that our insect cannot belong to that family : this figure 
also establishes a valuable fact, that the produced thorax is not 
confined to one family. I shall not at present attempt to prove 
whether Masoreus ought to be associated with the Trechi or 
the Troncatipennes of Latreille ; at the same time it will not be 
irrelevant to observe, that the uniform length of the joints in 
the antennae, as well as the form of the maxillary palpi, make 
so near an approach to Dromius, that it is not improbable but 
Masoreus may unite that group with the Scaritidae : whether 
the genus Apotomus will assist in such an arrangement I am 
unable to say from the want of specimens. 
Masoreus luxatus is a rare and interesting insect, and has 
never been either described or figured in any English work. 
For specimens I am indebted to my friend Mr. Dale, who 
found them under stones by the Isthmus of Portland or Chesil 
Bank, June 17th, 1829 . 
The specimen of Silene maritima (Sea Catchfly) was from 
the same locality. 
