(Demy  8vo.,  bound  in  Cloth.    Price  5/-).
Deals  exhaustively  with  all  the  views  brought  forward  by  scientists  to  account  for  the
forms  of  melanism  and  melanochroism ;  contains  full  data'  respecting  the  distribution  of
melanic  forms  in  Britain,  and  theories  to  account  for  their  origin ;  the  special  value  of
"  natural  selection,**  *•  environment,'*  •*  heredity,*'  "  disease,'*  **  temperature,"  &c.,  in
particular  cases.  Lord  Walsingham,  in  his  Presidential  address  to  the  Fello\es  of  the
kntomolog^cal  Society  of  London,  sa>*s,  "  An  especially  interesting  line  of  enquiry  as  con-
nected with  the  use  and  value  of  colour  in  insects  is  that  which  has  been  followed  up  in  Mr.
Tutt's  series  of  papers  on  •  Melanism  and  Melanochroism.*  **

British  Butterflies.
(Illustrated.     Crown  8vo.,  Cloth,  Gilt.     Price  5/-).
This  book  consists  of  476  pages,  contains  10  full-page  illustrations,  and  45  wood-cuts.
There  are  figures  of  every  British  butterfly.  Sometimes  three  or  four  figures  of  the  same
butterfly  to  illustrate  the  two  sexes,  underside  and  variation  are  given.  The  full-page
illustrations  and  most  of  the  wood-cuts  have  been  drawn  by  the  well-known  entomological
artist,  Mr.  W.  A.  Pearce.
Each  British  butterfly  is  described  under  the  following  heads  :  — (r)  Synonymy.  (2)
Imago.  (3)  Variation,  with  summarised  diagnoses  of  all  described  forms,  British  and  Con-
tinental. (4)  Egg.  (5)  Lar^'a.  (6)  Pupa.  (7)  Time  of  appearance.. (8)  Habitat  and  Distribution.
Besides  these,  there  are  extended  remarks  on  each  of  the  Tribes,  Subfamilies,  Families,
Divisions  and  Superfamilies.  The  descriptions  of  the  "Larvae*'  and  "Pupae**  are  mostly
original.  There  are  282  aberrations  and  varieties  diagnosed,  of  which  1 1 1  are  described
for  the  first  time.
