Vo]. Xxix] ENTO^IOLOGICAL NEWS. 2/1 



Notes and. News. 



BNTOMOLOGICAL GLEANINGS FROM ALL QUARTERS 

 OF THE GLOBE. 



Occurrence of the Damselfly Argiallagma minutum (Selys) in 

 Southern Florida (Odonata). 



In a small collection of dragonflies made liy Mr. C. A. Mosier on 

 Paradise Key, Royal Palm State Park, in the Everglades of Dade 

 County, Florida, November, 1917, and deposited in the National Mu- 

 seum by the Bureau of Plant Industry, United States Department of 

 Agriculture, through Dr. W. E. Safford, were two female specimens 

 of this interesting little dragonfly. This appears to be the first record 

 of the occurrence of this Neotropical species within the limits of the 

 United States. 



The species was described from Cuba in 1857. Dr. Calvert, in the 

 Neuroptera volume of Biologia Centrali-Americana, pages 376-377, 

 records it from Calisco, Cuba, (one male and one female collected by 

 Poey) and from Los Amates, Guatemala, (one male collected Janu- 

 ary 16. 1905. by Mr. E. B. Williamson). 



The monotypic genus Argiallagma. as stated by Dr. Calvert, be- 

 longs in the same division of the legion Agrion as do Hyponciira and 

 Argia. but differs from those genera in that the long biserial hairs are 

 less numerous (5-7 on the third tibiae), the postcubitals are fewer in 

 number so that the nodal sector arises near the fifth postcubital on the 

 front wings and near the fourth on the hind wings (origin of this 

 sector one or more postcubitals farther distad in Hyponetira and 

 Argia), and the female has an apical ventral spine on the eighth ab- 

 dominal segment. 



No doubt additional collections made in this picturesque section of 

 Southern Florida will bring to light other interesting dragonfly rec- 

 ords. — RoLLA P. CuRRTE, Burcau of Entomology, United States De- 

 partment of Agriculture, Washington, D. C. 



Emergency Entomological Service. (U. S. Dept. Agric.) 



In the following summary of number 12 of these reports, dated 

 lime I. 1918, topics are arranged in the same order as that followed 

 in the summary of number 11 (Ent. News, June, 1918. pages 234-236) 

 for ease of comparison. 



Climatic Effects on Insects. — At the insectary at East Falls Church, 

 Virginia, little winter killing of wood-boring Cerambycid larvae was 

 observed and data are given for the conclusion "that a continued low 

 temperature is more fatal to these wood-boring larvae than fluctuating 

 low temperatures and that the fatal low temperature is somewhere 

 between 15-20 deg. [F.] below zero. Also there seems to be a greater 

 mortality in exposed wood than in moist logs on the ground. The 

 difference in humidity under these conditions may be an important 

 factor." Milder winters around Washington seem to have more dis- 

 astrous effects on the European Pine Sawfly (Diprion simile Hartig) 



