get rid of the thistles. latter with a pinkish tinge. There 
In Canada, there is also a Thistle- are also some white markings near the 
fly, belonging*to the same family as apex on the front wings, and other 
ours (Trypetacae). This destroys the markings which we shall describe in 
imported field thistle, but is itself de- full perhaps in a subsequent article 
stroyed in such large numbers by a specially devoted to this butterfly, 
parasite that it seems unable to keep This butterfly is found in almost every 
the thistles down like our fly. From part of the world, and sometimes oc- 
over 200 larvae of the Canadian thistle- curs in vast numbers. In 1885 they 
fly, collected by Mr. James Fletcher, were exceedingly abundant in Cana- 
only two flits were bred, all the rest da and Massachusetts, and in 1879 
were destroyed by a small black para- we observed myriads of them in the 
site, named Solenotus fleichen. We south of England, 
believe that our fly also suffers from There are other thistle-infesting 
the attack of a uaiasit , hut not to ins< cts of which we may have some- 
such an extent as the Canadian fly; thing to say another time. One of 
our only evidence in the matter be- the most noticeable is a pretty red 
ing that a bnlbant green parasite fly weevil, called Rhynchites bicolor, 
is often found on the tldstles infected which we found on a thistle near Ula; 
by the Thistle-bud fl> , b t whether it but this is also found on other plants, 
is parasitic on that or some other in- Besides these insects there is a fun- 
sect in its early stages we do not gus found on thistle near Ula, called 
know. Puccinia suayeolens. We found both 
We have also the thistle butterfly uredo and teleutospores, and sent 
(Pyrameis caidui.) whose spiny cater- specimens to Mr. I. B. Ellis, who 
pillars may often be found on thistles, wrote, “The uredo is common here 
spinning a sort of web. It is curious (Newfield, New Jersey) but I have 
that a spiny plant should have spiny never seen the teleutospores before.” 
caterpillars on it — and what is still notes. 
more curious, according to Buckler, We hear that the s teep-herders in 
some of these caterpillars which were Glove Carbon, near Rush Creek, 
feeding on a mallow, which has no Pueblo county, have recently suffered 
spines, developed hairs; although at from mountain lions, which have been 
the same time they were not without quite destructive among the sheep, 
their spines, having no doubt inherit- Golden eagles have also appeared, and 
ed these from thistle -feeding ances- have attacted the young lambs. Poi= 
tors. The tnistle^butterfly is about son was accordingly laid down, and a 
two inches across the wings, and i$ mountain lion hnd three eagles wcm 
marked with black and . fulvous, the killed; one of the latter measured^! 
f 
