Vol. XXV] ENTOMOLOGICAL NEWS. 57 



the material before me, it seems that any detailed descriptions might 

 be more misleading than otherwise. The absence of any extensive, 

 well defined area of black is at once a conspicuous character. In 

 pallidus a dorsal interrupted green or yellowish green stripe, con- 

 tinued from the pale area between the wings, extends from 1-7, this 

 stripe bordered by brown which shades out indefinitely ventrally, ex- 

 cepting on i and 2, where, as generally in the genus, the color pattern 

 is better defined, the sides below of these two segments being similar to 

 the pale thoracic colors; 8-10 are brown or yellowish brown, 10 the 

 lightest color and possibly in the male sometimes yellow. In the 

 females of the other two species the color pattern is essentially similar, 

 but in the males of these two, segments 3-6 are largely pale, the 

 color of the middorsal stripe, with apical dark brown spots on either 

 side of the dorsum. In submedianus male segments 7-10 are similarly 

 colored, orange or golden brown, with 10 paler. In subapicalis, on 

 the other hand, segment 7 more closely resembles 6 (rather than 8) 

 as in pallidus. 



Abdominal appendages, male. Yellow or yellowish brown in color, 

 extreme apex and tubercle of the superiors and the apex of each 

 branch of the inferior black or dark brown. In pallidus and sub- 

 medianus the ventral tubercle is placed near the middle of the superior 

 appendage ; in subapicalis it is placed beyond the middle and in size is 

 reduced to a minimum, the maximum being reached in pallidus. The 

 appendages of pallidus and submedianus are very similar. When the 

 appendages are in the position shown in Figs. 18 and 27, in pallidus the 

 dorsal and inner edge of the right superior appendage is straight 

 or a flat uniform curve; in submedianus this edge has a distinct angle 

 at the base of the needle-like apex, as though the edge were wrinkled 

 or folded. 



Vulvar lamina, female. In de Selys' 3 and 4 and Hagen's 4 the 

 vulvar lamina lies close to the abdomen, but little erected ; in my 

 material in every case the lamina is more erect, and the maximum 

 in this direction is shown in fig. 10. I believe that the position of the 

 lamina in this respect is largely a matter of chance, since there is 

 apparently nothing in the form of the lamina of fig. 10 to prevent it 

 being closely appressed to the abdomen. 



EXPLANATION OF PLATES IV AND V. 



Four half tone figures from drawings from Mons. Guillaume 

 Severin. Upper two, Gomphus pallidus, de Selys No. 2; lower two, 

 Gomphus villosipcs, de Selys No. i. 



All the numbered figures are of the same magnification. 



Figs. 1-12, Gomphus subapicalis; figs. 1-8, male; figs. 9-12, female, 

 i, 2, 3, dorsal, ventral and lateral views of abdominal appendages ; 

 4, anterior lamina ; 5, accessory genitalia ; 6, postocellary vertical ridge, 



