June, '09] ENTOMOLOGICAL NEWS. 283 



and five have many circular tuberculate sensoria. Joint three has about 

 30, four about 8, five about 4 sensoria, and six has the usual cluster at the 

 tip. The number to a joint is somewhat variable. 



A/ate male, Plate XI, figs. 5, $a. 



Head, antennae, lobes of mesothorax, legs, except bases of femora, 

 sternum, pleura of mesothorax and cornicles black; abdomen rusty brown; 

 eyes very dark red, appearing almost black. Length of body 1.80-2 

 mm. ; antennae 1.60 mm. ; joints three .40; four .21 ; five .18; six .09; 

 seven .51 mm. Joints three, four and five with very numerous small cir- 

 cular sensoria, joint three being specially rough and tuberculate ; joint 

 six very short and stout ; cornicles short, cylindrical, .14 mm. long. The 

 abdomen above is marked with more or less distinct transverse dusky 

 dashes that are largest over the posterior half. Prothoracic tubercles 

 usually present at hind angles ; cauda very small ; length of wing 3.40 

 mm., hyaline ; stigma dusky, veins dark brown. 



Apterous oviparous female, Plate XI, figs. 6, 6a, 6b, 6c. 



The abdomen long and pointed posteriorly ; when young, pale yellow, 

 almost white in color ; becoming sordid yellow to salmon-pink as they 

 mature; eyes red ; tips of cornicles and cauda blackish. Length 1.50- 

 1.80 mm.; antenna . 45-^0 mm. long, six-jointed, joint three the longest, 

 being a little longer than 4 and 5 combined, and joint six is nearly as long 

 as three. Cornicles short, cylindrical, not as long as hind tarsi. Hind 

 tibiae broad, flattened, and with numerous oval sensoria of varying size 

 throughout its length. There are no lateral tubercles upon thorax or 

 abdomen. 



A few important records at Ft. Collins are as follows : 



April 10, 1904, the very earliest lice are now hatching and 

 accumulating upon the opening buds of the snowball. 



April 15, 1902, lice hatching and accumulating on the open- 

 ing buds. 



May 7, 1903, lice beginning to curl the leaves. Largest 

 leaves about i cm. long. Many Syrp/ius-fiy eggs are being 

 laid ; largest lice now 1.80 mm. long, pale green in color, and 

 covered with powder, no spines or tubercles. 



May 1 8, 1908, Ft. Collins, stem-mothers and their young 

 abundant in the curled leaves, the former all deep blue or 

 greenish blue in color, and the nymphs apparently all becom- 

 ing pupae, some of which seem fully grown. 



June 13, 1901, many white larvae and pupae, and some 

 alate females. Apparently all stem-mothers are still living. 



June 13, 1901, the louse upon snowball bushes does not 

 agree with Bucktou's description of Aphis viburni. 



