80 Thomas Albert Williams 



olive. Eyes red. Antennae somewhat longer than the body, olive brown, 

 with tips of III, IV and V and all of VI and VII black; VII longer than 

 III, the latter with sensoria. Legs as in the apterous form. Honey tubes 

 and tail more slender and not quite so long, otherwise similar. Wings 

 delicate, with pale yellowish subcostal, dusky yellowish stigma, prominent 

 blackish brown oblique veins. Stigmal curved gradually its entire length. 

 Cubital nearly or quite obsolete at. base; second branch originating equi- 

 distant from the apex of wing and the first branch. Length of body 3-3.40 

 mm., to tip of wings 4.50 mm. 



Found very plentifully on Gaura parviflora, at Ashland, July- 

 October, 1890. The green species of this genus are very hard to 

 define. This species is similar to S. pisi and S. pelargonii, but 

 differs in its shorter antennae, legs and honey tubes, the promi- 

 nent discoidals and the color markings of the limbs. It was 

 watched very closely during the season, and these characteristics 

 were found to be constant. 



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

 140). 

 103. Siphonophora gaurina n. sp. 



Apterous viviparous female: Broadly ovate. Head small, pinkish flesh- 

 color, whitish pruinose. Antennae on rather small frontal tubercles, hardly 

 reaching to base of honey tubes, pale, tips of III and IV dusky; tip of V 

 and all of VI and VII black; III a little longer than VII. Eyes red, with 

 a very small brown tubercle. Beak reaching beyond the middle coxae. 

 Legs short, tibial tips and tarsi black. Honey tubes not reaching to tip 

 of abdomen (0.60 mm.), slender, larger at base, pale, with slightly dusky 

 tips. Tail yellowish, three fourths the length of the honey tubes, rather 

 slender, hairy. Length of body, 4 mm. 



Pupa: Similar in every respect, except that the size is much smaller and 

 the tail conical. Wing-pads whitish. 



On Gaura parviflora. Ashland, September, 1890. This, in 

 general appearance, is somewhat like 5". carnosa Buckton. It is 

 very different from that species, however, when studied closely; 

 and, although found together with 5. gaurae, is plainly specifically 

 distinct from that species. It is much larger, of a different shape 

 and much quicker in its movements than that species. 



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

 141) and of the U. S. National Museum (nos. 17, 397). 



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