THE CANADIAN ENTOMOLOGIST. 65 



bright green in colour, were seen upon the leaves, which became deep 

 shining black later (fig. 5). 



]Vi?igeii Male. — (Plate 3, figs. 6 and 7.) 



Colour, a pale greenish-yellow; head, prothorax, -lobes of mesothorax 

 above and below and three lateral spots upon the abdomen, yellowish 

 brown; antennae, cornicles, tibi?e, tarsi and distal ends of femora dusky to 

 blackish ; eyes dark red ; in some specimens the dorsum of the abdomen 

 shows transverse yellowish-brown lines upon many of the segments. 



Length, about 1.40 mm.; antenna, 2.90 mm. Joints : III .60, IV 

 .51, V .48, VI .16, VII I mm. Joints 3, 4 and 5 all have a row of 

 very small and slightly tuberculate sensoria upon the under side for their 

 entire lengths (fig. 7). Cornicles a little curved, distinctly clavate, and 

 • 55 mm. long ; venation of wing conspicuously black. Frontal tubercles 

 for antennae short but fairly stout; ist joints of antennae gibbous upon 

 inner side ; cauda concolorous with body or a little dusky. 



On account of the somewhat incrassate cornicles I am placing this 

 species in the genus Rhopalosiphutn, but it has the general appearance of 

 Macrosiphuin. This was by far the most common rose louse about Fort 

 Collins the past summer. Described from examples taken with the 

 oviparous females above. 



Macrosiphmii Sa7ihorni* n. sp. 



A brownish-black pyriform louse, with all parts of the body above 

 highly polished. From chrysanthemums in greenhouse. 



Apterous Viviparous Female. — (Plate 3, figs. 8 and 9.) 



Colour, to the naked eye,' very dark brown or black. The lightest 

 portions are the margins of the meso- and metathorax, and the posterior 

 and posterio-lateral portions of the abdomen. The cauda, the cornicles, 

 the distal ends of the femora, the proximal and distal ends of the tibiae, 

 joints I and 2 and distal half of antenna, black; greater portion of 

 tibiae, basal portions of femora and 3rd joint of antenna, brownish yfellow ; 

 eyes very dark red. 



Length of body, 1.85 mm.; antenna, 1.85 mm. Joints : III .53, IV 

 .27, V .26, VI .12, VII .50 nmi. Cauda, .26, and cornicles, .24 mm. 



* Koch's black chrysanthemum louse, Aphis chrysanthemi, can hardly be 

 this species, as it was described and figured as having- the cauda very short, 

 hardly lonofer than broad. Macrosiplium campamilce (Kalt) seems to be the 

 most closely-allied form so near as I can determine from the literature that I 

 have access to. 



