The Aphididae of Nebraska 75 



drawn out into an obtuse angle, and a black line on its front edge. Beak 

 reaching middle coxae. Eyes dark red. Wings with yellowish insertions, 

 subcostal and stigma, the latter rather long and pointed and angled at base 

 of stigmal vein ; oblique veins slender and brownish. Abdomen broad, 

 with marginal spots of black. Honey tubes as in apterous female but 

 rather slenderer and longer. Tail half as long as honey tubes, robust, 

 upcurved, yellowish. Length of body 2.40 mm., to tip of wings 4 mm. 



On bur marigold (Bidens connata and B. chrysanthemoides) , 

 generally along the upper leaves and flower stalks. Lincoln, 

 Weeping Water, October, 1888; Ashland, October, 1890. Most 

 of the winged individuals have the legs all black but base of 

 femora. This species has much of the appearance of an Aphis 

 but has the honey tubes and tail and frontal tubercles of Sipho- 

 nophora. It is very close to several of the European species on 

 Composites. 



Specimens in the collection of the University of Nebraska (no. 

 130) and of the U. S. National Museum (nos. 9, 349). 



95. Siphonophora chrysanthemicolens n. sp. 



Apterous viviparous female: General color dark seal brown to a purplish 

 black, often with a very distinct coppery tinge. Head, prothoracic segment, 

 all the antennae but the basal two thirds of III, honey tubes, tail, anal 

 plates, coxae, distal half of femora, both ends of tibiae and tarsi deep 

 shining black. Basal two thirds of III dusky; proximal half of femora 

 and middle portion of tibiae yellowish. Antennae about as long as the 

 body, on distinct, medium sized frontal tubercles; III and VII subequal, 

 the former with a few small circular sensoria, the latter minutely annu- 

 late. I and II very robust. Eyes black. Beak reaching to or beyond the 

 hind coxae. Abdomen carinated. Honey tubes much larger at the base 

 than at the tip, 0.44 mm. long. Tail as long as honey tubes, very robust, 

 upcurved, hairy. The whole insect, especially its legs, head and the base 

 of the antennae covered with long black hairs. Length of body about 

 2.40 mm. 



On upper part of stem and leaves of chrysanthemum in green- 

 house at Omaha, January 16, 1891. Lincoln, Brookings, S. D., 

 Minneapolis. A small, well characterized species, having much 

 the appearance of an Aphis, but the legs are long and the frontal 

 tubercles and tail place it in Siphonophora. It is easily recog- 

 nized by its shining black markings, large tail and rather short, 



159 



