Was &n Open joint about three inches in length at the top. Into this chamber so 
formed the beetles would crawl to hide during the day, and were easily and 
quickly crushed by pushing a small rod down the cane every morning without 
removing the cane. In this way Mr. Scrim destroyed large numbers at a time 
of the year when it was inconvenient to renew all the soil in his rose-houses. 
Prof. Riley quotes in his 1878 report from an account written by the late Mr. 
Peter Henderson, of New York, of the work of this beetle. After stating his 
belief that the failure of many to grow roses is due to the unknown presence of 
the larvee at the roots, he says as follows: “Mr. John May, the gardener in charge 
of Mr. Slaughter’s rose-growing establishment at Madison, New Jersey, which is 
probably the largest in the vicinity of New York, has given great attention to 
the rose bug, his roses for four or five years being much injured by it; but by 
persistent efforts in destroying the perfect insect, he has now got entirely clear 
of it.” 
Experiments to destroy the larvee and pupz in the ground by means of bisul- 
phide of carbon were unsuccessful. 
Prof. Riley having discovered the habits of the insect as to the deposition of 
its eggs suggested the value of placing traps, composed of rags, tape or paper tied 
round the stems of the plants or round short sticks placed close to the plants. In 
these the females would lay their eggs. The eggs take about a month to hatch, 
and by scalding the rags at short intervals all the eggs would be destroyed. If 
the plan of tying rags to sticks be adopted these can be dipped in scalding water 
and again replaced at once without untying the rags. 
With this as with most of the other injurious insects the most important thing 
is for the florist to recognise the serious nature of the attack and the necessity of 
carrying on the war unceasingly until every appearance of the enemy ceases. 
HYMENOPTERA PARASITICA. 
BY W. HAGUE HARRINGTON, OTTAWA. 
In his excellent work entitled a “Synopsis of the Families and Genera of the 
Hymenoptera of America, north of Mexico,” Mr. E. T. Cresson gives the following 
concise statement of the general characters of the order Hymenoptera. 
Wines four, membranous, the posterior pair almost always smaller than the 
anterior, with comparatively few nervures. 
MovutH mandibulate, and with a lower lip or tongue, sheathed by the 
maxillee. 
TARSI generally 5-jointed, rarely 3 or 4-jointed, very rarely heteromerous. 
ABDOMEN of the female furnished with a multivalve saw ovipositor, a borer, 
or a sting. 
LARVA vermiform and footless, except in the Phyllophaga and Xylophaga. 
Pura incomplete and inactive. 
Keeping these definitions in view it will be seldom difficult even for those 
who are not entomologists to decide whether a certain insect belongs to the 
Hymenoptera. Many flies (order Diptera) have a close superficial resemblance to 
species of Hymenoptera, but they may at once be distinguished on an examina- 
tion of the wings, of which they invariably have only two. 
