Feb., '02] ENTOMOLOGICAL NEWS. 47 



Strecker, Herman. Walsingham, Lord. Westwood, J. O. 



Stromberg, C. W. Walton, L. B. Wickham, H. F. 



Sumichrast, F. Watson, John. Wilson, T. B. 



Tourney, J. W. Webster, F. M. Williston, S. \V. 



Townsend, C. H. Weed, C. M. Wilt, Charles. 



Twogood, F. D. Weed, H. E. Wingate, J. D. 



Ulke, Henry. Weidmeyer, J. W. Wolloston, - 



Van Duzee, E. P. Welles, C. S. Wood, W. C. 



Wadsworth, Miss M. Wenzel, H. W. Wood, W. H. 



Walker, Francis. Wenzel, W: F. Young, D. B. 



Walsh, B. D. Westcott, O. S. 



A New Species of Gomphus (Odonata) related to 



G. fraternus. 

 BY E. B. WILLIAMSON. 



In eastern North America the hitherto recognized species 

 extcrnus, fraternus, crassus, dilatatus and vast u *' constitute 

 a group of the genus Gomphus characterized by the form of 

 the postanal cells, the color pattern of the thorax, and especi- 

 ally by the abdominal appendages of the males. Dilatatus and 

 vastus have the fronto-nasal sature black, and the eighth ab- 

 dominal segment immaculate above, the face being unmarked 

 and segment eight having a basal yellow or yellowish spot in 

 externus, fraternus and crassus. The following species which 

 appears new finds its nearest ally in fraternus. Dr. Cal vert's 

 recent critical study of fraternus, c.\tcrnus and crassus (ENT. 

 NEWS, March, 1901, pp. 65-73, P 1 - ni . l8 figures) makes it 

 possible to describe this species without indicating at length 

 points of difference and similarity. What is here said con- 

 stitutes a, fourth vertical column as an addition to the three 

 vertical columns of descriptive matter in Dr. Calvert's paper. 



Gomphus hybridus n. sp. 



Abd. d\ 35-37 ; ?, 35-36. H. w. d\ 27-8 ; ?. 29. 



(i). Superior abdominal appendages viewed from above not as robust 

 as fraternus and crassus, with the apices slenderer, separated by a dis- 

 tance greater than the length of one appendage ; 



(2). inner edge of each appendage concave in general direction, straight 



*I know ventricosus and consannis only from descriptions. They 

 seem to be most closely related to vas/us and di/aialus. 



