38 ENTOMOLOGICAL NEWS. [Feb., '03 



mum" in de Selys' handwriting;* these two males are from 

 the Museum of Comparative Zoology ; both have lost abdomi- 

 nal segments 7-10. De Selys describes this species as having 

 " Onglets obscurs a dent iuferieure beaucoup plus courte que 

 la superieure ;" I find the tooth of the tarsal claws represented 

 only by a minute rudiment in these two males (see PL III, 

 fig. 6). 



In favor of the relationship of daeckii to Telagrion are the 

 following agreements in structure (compare figs, i and 2, Plate 

 III) : () The shape of the pterostigma and the number of 

 cells surmounted by it ; () the shape of the quadrilateral ; 

 (c*) the origin of the inferior sector of the triangle at the sub- 

 median cross- vein ( ' ' nervule basale post-costale' ' of de Selys, 

 1876), as well as (d) its termination proximal to the level of 

 origin of the nodal sector ; (<?) the termination of the superior 

 sector of the triangle between the levels of origin of the nodal 

 and ultra-nodal sectors ; (_/) the number of postcubitals ; () 

 the presence of pale postocular spots ; (/*) the small number of 

 spines on the outer side of the third tibiae ; (?) the great pro- 

 portionate length of the abdomen and () the simple character 

 of its tenth segment. 



It is true that there are some disagreements with Telagrion, 

 such as the differently shaped superior appendages of the male 

 and the point of origin of the nodal sector (compare figs, i and 

 2, Plate III ; de Selys gives no data on this last feature). I 

 think, however, that these are not as great as the differences 

 between daeckii and any other known genus which might be 

 suggested, and I do not consider the erection of a new genus 

 for daeckii justifiable on our present knowledge. Of the 

 genera at present known from North America, one would 

 probably think of Enallagma as furnishing the nearest rela- 

 tionship for dacckii, but the characters above marked r, d, z, 

 are opposed thereto. 



It may be well to repeat here de Selys' remark (/. c. , 1876, 

 p. 967): ' II est possible qu'il faille encore subdiviser ce sous- 

 genre \_Telagrion\) car les especes du i er groupe \_fulvellum, 



* Longissiuiinn was a name employed by Hagen in his List of Neurop- 

 tera of South America (Syn. Neur. N. Am., p. 310. 1861), but without 

 description. It is cited by de Selys (/. c,, 1876, pp. 970, 972) but abandoned 

 for longum. 



