BULLETIN 



OF THE 



BROOKLYN ENTOMOLOGICAL SOCIETY 



Vol. XVI December, 1921 No. 5. 



A NEW DRAGONFLY FROM FLORIDA. 



By Wm. T. Davis, Staten Island, N. Y. 



In 1839 Say described Libelhda transversa from a male sent 

 to> him from Massachusetts by Dr. Harris. He gives the length 

 of the insect as two inches, and also states " wings hyaline ; basal 

 cellula brown." In the complete writings of Say on the Ento- 

 mology of North America, 1859, Uhler states that the species 

 was " Subsequently described as Epophthalmia cinnamomea 

 Buim. Handb. 2. 2. 845: and Didymops servillei Ramb., 

 Neuropt. 142." 



Burmeister's description of cinnamomea was made from a 

 female collected in Carolina by Zimmermann, and covers what 

 is now called transversa; he also mentions " fuscous basal spot 

 on each wing." 



Rambur states that his Didymops servillii is almost the size of 

 qiiadrimaciilata but a little longer, that the wings are hyaline 

 with a small reddish spot in front at the base. Rambur pro- 

 posed the genus Didymops for servillii (^= transversa), which 

 genus is separated from his genus Macromia by having the 

 occiput on the dorsal surface of the head more prominent and 

 much larger than the vertex. In Genera Inscctorum, Martin 

 (1914) lists transversa under Macromia, together with nine 

 species placed in that genus by American authors. 



In the writer's collection there are two male dragonflies be- 

 longing to a species that is close tO' Didymops transversa in 

 structure and markings, but is larger and shows specific differ- 

 ences. One of them was submitted to Mr. E. B. Williamson, 

 who has very kindly loaned me twenty-one specimens of trans- 

 versa from his collection, which, with fourteen from my own, 



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