Sub-titled Studies in the Socio-biology of Crime, this analysis of the ""interstitial areas between social and constitutional forces in crime"" is of a highly specialized, scientific nature if not, however, without interest. Here, with supporting evidence, both facts and fictional misconceptions are pursued, and if no conclusions are reached, tendencies are indicated. In the first part, Constitutional Factors and Crime, certain physical aspects are considered; appearance, factors in birth, heredity, disability, intelligence; various types of mental diseases and deficiency, addiction, etc. In Part II, the Socio-biological Elements and Crime, here is the influence of gangs and mobs; questions of rural versus urban habitat; foreign born groups versus native born; occupational and religious influences. The third part, Geophysics and Crime, analyzes climate, seasonal change, etc... Widely researched, these studies are the result of intensive investigation and should be of value to socio-criminologists.