1917] ECONOMIC ZOOLOGY — ENTOMOLOGY. 659 



the epecies and races of mammals, described up to the date of publication, 

 which inhabit the North American continent from the Arctic Ocean to the 

 Province of Cauca in Colombia, South America, together with those of the West 

 Indies Islands and the adjoining seas. Tliey are arranged systematically 

 according to the author's views, and descriptions are given of those forms that 

 have received names since his two previous worlis were published* (E. S. R., 

 16, p. 233). The species enumerated in the list number 1,309 and 676 races of 

 species found within the geographical limits embraced, together with 22 races 

 of exotic species originating in South America. The type locality and geograph- 

 ical distribution, where known, are given in every instance. 



The supplement, which is edited by J. A. Allen, lists the species and sub- 

 species that have for the most part been described since the publication of the 

 earlier works on which the check list was based, down to the end of the year 

 1914. In addition to being a supplement to the check list, it is also a con- 

 tinuation of the preceding two manuals on the subject, since it gives descrip- 

 tions of forms added as well as the usual check list matter. It contains many 

 changes in generic nomenclature from that of the check list proper, many 

 groups treated in the latter as subgenera being given the rank of genera, while 

 the changes in generic names shown to be necessary since the publication of the 

 check list are duly recorded. 



Report of the entomolog'ist, J. R. Watson {Florida Sta. Rpt. 1916, pp. 51- 

 65). — Attempts to establish Calosoma sycoplianta were not successful and it 

 appeal's that this beetle is not adapted to the climatic conditions of Florida. 



In further observations (E. S. R., 35, p. 852) of the Florida flower thrips 

 {[Euthrips'\ Frankliniella tritici projectua) kept in test tubes constantly sup- 

 plied with fresh rose petals, many lived for several weeks, and one individual 

 lived for 59 days. The observations establish the fact that they spend the win- 

 ter as adults, though there may be some breeding during the warm periods in 

 any month of the year, but there are no indications that they ever enter the 

 ground or seek other shelter than the depths of the flowers. The author's 

 observations show that prolonged and dashing rain is the chief natural factor 

 in reducing the numbers of thrips. Spraying work in the control of thrips on 

 citrus indicates that it will pay well for one spraying even when the bloom is 

 unusually irregular and scattering. 



Studies made of an outbreak of thrips on strawberries at Waldo showed the 

 infestation to be heavy, as many as 50 adults and larvae being found in a single 

 bloom. When thus heavily infested the bloom failed to set fruit. Successful 

 control of the pest was obtained through the application of a home-made tobacco 

 decoction of tobacco stems soaked overnight in enough water to cover them, ap- 

 plied at the rate of 3 gal., and a pound of soap to each 15 gal. of water. 



In April, 1916, the Florida flower thrips was found to injure camphor trees, 

 the damage to the unfolding buds of camphor being very similar to that caused 

 by the camphor thrips, previously noted (E. S. R., 31, p. 751). 



Work on combating nematodes by the use of calcium cyanamid is noted on 

 page 652. 



The report concludes with brief notes on the insects of the year, including 

 accounts of an unusual outbreak of the striped cucumber beetle in south Flor- 

 ida, where they killed bearing okra plants and watermelons and even attacked 

 Irish potatoes, and destroyed the young growth of citrus, it being the first record 

 of injuries to citrus in Florida by this pest. The woolly white fly (Aleuro- 

 thrixus howardi) continued to extend slowly into the regions adjacent to its 

 previous range. The cowpea pod weevil {Cltalcodermus aeneus) is said to have 



^ElynopBia of North American Mammals. (Field Columbian Mus., Zool. Ser., 2 (1901). 



