264 ENTOMOLOGICAL NEWS. Qune, '08 



Grambus oslarellus sp. nov. 



Expanse of wings 25-30 mm. Head and palpi cinereous. Primaries 

 and thorax lustrous bronze, with a silvery white stripe from the base 

 to near subterminal line; a tooth in the middle on the lower side, 

 and a small white spot above the outer end of white stripes. Sec- 

 ondaries smoky white. The species closely resembles Crambus prac- 

 fectellus, and has no doubt been confounded with it. The principal 

 points of difference are its much larger size, the smoky hind wings, 

 and the absence of reddish line inside of white subterminal line, which 

 is present in praefectellus ; also the subterminal line forms nearly a 

 right angle, which is not the case in praefectellus. 



Described from ten specimens, collected at Silverton, Colo., 

 and Clear Creek, Colo., vii, 3, '07, by Mr. E. J. Oslar, in 

 whose honor this species is named. 



Three related American species of Aeshna (Odonata). 



BY E. B. WILLIAMSON. 



The three species are : multicolor Hagen, mutata Hagen and 

 jalapensis n. sp. They are characterized as follows : 



Rs forking proximal to the level of the stigma, with 3 or 4 rows 

 of cells between the fork at the level of the distal end of stigma ; 

 the proximal side of the triangle in hind wing more than half as 

 long as the posterior side; membranule fuscous with the base more 

 or less white or gray ; stigma of adult males dark brown or black above ; 

 dark yellowish brown beneath ; immature males and females have 

 the stigma golden yellow, paler beneath ; a ventral spinulose tubercle 

 on abdominal segment i ; a black T-shaped spot on the frons, which 

 spot widens posteriorly to enclose the vesicle in black, and margins 

 the eyes in front with a line of black; thorax brown with a dorsal 

 and two lateral stripes on each side ; legs black, the first femora of both 

 sexes beneath with a pale streak for half their length and all femora 

 of females reddish brown above for the greater part of their length ; 

 abdomen constricted at segment 3 ; males with a minute median dor- 

 sal tooth on abdominal segment 10, and appendages seen in profile 

 distinctly forked at apex with an angulate dorsal carina ; abdominal 

 appendages of the female of usual form, the apex rounded obtuse, 

 varying from 5 to 7 mm. in length in different species. 



DIFFERENTIALS: Mutata and jalapensis are separated at 

 once from multicolor: males, the inferior basal tubercle of 

 the superior appendages in multicolor at one-fourth to one-fifth 

 the length of the appendage, in jalapensis and mutata at one- 



