174 



posterior lobe. Thorax wiih a rather narrow mid-dorsal stripe (sometimes divided 

 by a mere line of blue, most distinct anteriorly), and a very narrow humeral 

 stripe, wider in front, especially at the suture, and a spot on second lateral suture, 

 black. A wide ante-humeral stripe, equal to or wider than the mid-dorsal black 

 stripe, blue. Abdomen blue, the following black : A spot on base of 1 ; a trant- 

 verse lunule (convex side forward, doubly concave behind) near apex and a nai- 

 row marginal band on 2; an apical spot connected with marginal band on 3 and 

 4; apical third of 5, two-thirds of 6, five-sixths of 7, and all of 10. 



"Superior appendages short, one-fourth to one-third as long as 10, blunt, 

 with the apex directed downward and slightly notched in profile; the upper limb 

 thick and rolled inward, the lower limb thin, rolled inward and upward, appear- 

 ing like a sm,all, rounded, inwardly projecting shelf on the lower edge of the apex 

 of the appendage. In profile the upper apical angle is very obtusely rounded, the 

 lower slightly notched. Inferior appendages longer, two-thirds as long as IC, 

 rather slender, tapering, slightly curved upward, directed upward and backward, 

 the lower margin convex throughout." Nevada, Wyoming and other western 

 States, and Massachusetts. This is an interesting addition to the list of Enallax,- 

 mas known to occur in Indiana, bringing the number to thirteen, and leaving two 

 regional species, doubledayi and aspersum, yet to be discovered. 



2. Ischnura keUicotti Williamson sometimes has the blue ante-humeral 

 stripe of the thorax interrupted as it is normally in Nehallennia posita and rarely 

 in Ischnura verticalis and Enallagma germinutum. Individuals were taken which had 

 the stripe continuous on one side and interrupted on the other. The species was 

 very abundant at Shriner, Round and Cedar Lakes, July and August, 1900, found 

 only about the white water-lily beds. Orange females were numerous. 



3. Dr. Calvert has recently called attention to the fact that Gomphns externus 

 as identified by Kellicott and as described in "The Dragonflies of Indiana," is 

 in reality Gomphus crassus. What is said of Gomphiis externus on pages 289 and 

 290 of "The Dragonflies of Indiana," excepting geographical range, belongs to 

 Gomphus crassus. Gomphus C7'assus is known from Kentucky, Ohio, Indiana and 

 Illinois. Gomphus externus has been taken in Illinois and westward in Nebraska, 

 New Mexico and Texas. It must be dropped from the ludiana list, though it 

 may be found in the State in the future. It may be separated from fraternus and 

 crassus by the following points : In externus the two lateral thoracic stripes are 

 complete, not shortened or interrupted. Externus has the dorsum of 9 and 10 with 

 a yellow band as usual in crassus. The appendages of the male of externus, as fig- 

 ured in the "Monographic des Gomphines," plate XXI, fig. 2, as seen in pro- 

 file, somewhat resemble fig. 20, plate VI, "Dragonflies of Indiana," excepting 



