ENTOMOLOGICAL NEWS. [Jan., '17 



and shallow punctures ; clothed with short oppressed yellowish pubes- 

 cence. 



Legs : dark fuscous brown, femora with a longitudinal row of dark 

 spots beneath, not visible in certain lights ; tarsi blackish, the basal 

 segment flattened beneath and extending well under the second seg- 

 ment (fig. 2). 



Venter: mostly dark grayish brown, blackish on the posterior mar- 

 gin of each segment; spiracles conspicuous, appearing as sunken black 

 spots ; rather long and prominent pale yellowish pubescence. 



$ . Similar to the female only more slender : length 5.7 mm. The 

 antennae and character of the first tarsal segment do not differ from 

 those of the female, though the length of the second antennal segment 

 (1.28 mm.) is slightly longer than the width of the head (1.14 mm.) 

 across the eyes. The male genital forceps are quite similar to those 

 of rubida thus not affording good specific characters but on the other 

 hand showing generic relationship. 



Described from a male and three females, Sept. 24, 25, 

 Promised Land, Long Island, New York, collected by Mr. 

 William T. Davis and Mr. G. P. Engelhardt. I have also seen 

 a half dozen other specimens from the same locality. 



Type : 9 , Sept. 24, Promised Land, Long Island, New York, 

 Wm. T. Davis ; author's collection. 



The writer has studied Uhler's type specimen of (Clivinc- 

 ma) rubida in the National Museum collection and was unable 

 to distinguish from it Colorado specimens which were later 

 determined as marginata by Mr. Van Duzee. It is evident that 

 the character of the antennae and the length of the rostrum 

 cannot be taken as generic characters but only as specific, 

 since these differ in each of three species. The form of the 

 pronotum and particularly the character of the calli and basal 

 segment of the tarsi appear to be distinctive of the genus Lar- 

 c/idea. 



Correction of the Specific Name of a Dragonfly (Odon.). 



Metalcptobasis brysonima Williamson, Proc. U. S. Nat. Mus. Vol. 48, 

 1915, p. 602. On September 4, 1916, Dr. Calvert wrote me that in the 

 Kew Index he found no generic plant name Brysonima, but a Byrsoni- 

 ma, and in Pittier's list of Costa Rican plants two species of Byrsonima 

 are recorded. Under date of October 9, he writes me that he believes 

 a correction of the specific name of the dragonfly is permissible under 

 Article 19, Intern. Rules Zool. Nomenclature. This correction is here- 

 by proposed and the name changed from Metaleptobasis brysonima to 

 Metalcptobasis byrsonima. E. B. WILLIAMSON. 



