22 ENTOMOLOGICAL NEWS [Jan., '19 



bright yellow, the flagellum brownish black. Head brown ; vertex 

 rather broad. 



Pronotum grayish brown. Mesonotum light brown without stripes ; 

 pseudosutural foveae distinct, black. Dorsal pleurites indistinctly gray- 

 ish, the ventral pleurites yellow. Halteres brown. Legs with the coxae 

 and trochanters yellow ; femora dull yellow, the tips narrowly and 

 abruptly blackened ; tibiae yellowish brown, the extreme bases and tips 

 a little darkened; tarsi brown, the metatarsi more yellowish. Wings 

 with a strong brownish tinge, more yellowish basally and along the 

 costa ; veins dark brown, subcosta yellow. Venation about as in D. 

 tiprina. 



Abdomen yellowish brown without distinct darker markings ; tergite 

 seven concolorous with the other abdominal segments. Hypopygium 

 yellowish. Male hypopygium with the dorsal pleural appendage flat- 

 tened, very broad, the surface covered with setae. The narrow ventral 

 appendage is produced into a long slender apical point. Gonapophyses 

 short, not acicular or projecting conspicuously between the pleurites. 



Habitat: Kansas. 



Holotype, $ , Lawrence, Douglas County, Kansas, alt. 900 ft., 

 July 16, 1918. Allotopotype, ? . Parato'potypes, 50 $ $ . 



The types of the new species are in the collection of the 

 author. Paratypes have been placed in the leading collections 



of the country. 



< ' 



Cordulegaster dorsalis (Odonata) as an Enemy of Trout. 



Mr. Frank Springer writes from the Abbott Ranch, Rito de los 

 Frijoles, New Mexico, Sept. i, as follows: 



"I am sending you some beasties, that I should like to know a little 

 more about. They are highly predaceous devils, and I first discovered 

 them in the act of seizing some of 'a lot of young trout which I was 

 placing in the brook here. The bug lies buried in mud or sand, in 

 shallow parts of the stream where the current is not very swift, with 

 only his eyes projecting. When a little fish (about an inch long) comes 

 wiggling along close enough over the bug, he snaps, projecting his 

 formidable mandibles [lateral labial lobes] and the shovel-like part 

 below them for quite a distance to the front, and catches the fish by 

 his wiggling tail. By simulating the wiggling motion of a fish with a 

 knife-blade, I could induce the bug to snap at it, and thus saw the 



motion several times I found the creatures quite numerous 



in the shallow, quieter waters where T was planting the young fry, and 

 apparently they constitute a rather serious menace to the stocking of 

 the stream, as they infest the shallow places, while the deeper water 

 is dangerous on account of the older fish. I find that the trout eat 

 these bugs to some extent, as in several instances they were contained 

 in the stomach, and they are readily taken when offered as bait." 



Specimens sent agree in all particulars with Cordulegaster dorsulis 

 Hagen, as described and figured by Needham. T. D. A. COCKERELL, 

 Boulder, Colorado. 



