568 The Insect and Allied Pests of the Hop. [oct., 



obnoxious to them. I have found Vaporite fatal to them. 

 Sometimes these grubs are to be found in numbers in manure, 

 and there is no doubt that in this way they get carried into 

 the hop gardens. 



The Hop-leaf Miner (Agromyza frontalis, Mg.) 



The larvae of this small fly are frequently to be found in 

 the leaves of hops, where they form tunnels between the 

 upper and lower surface of the leaves ; but they never occur 

 in sufficient numbers to do any harm. It is not recorded as 

 British by Verrall, but it is evidently Meigen's species, and 

 was referred to by Whitehead in speaking of the Strig 

 Maggot as follows : "Others hold that they are the larvae of 

 a species of fly, Agromyza frontalis, which are also known to 

 be leaf- and stalk-miners." This species is now known to 

 have nothing to do with the strig attack. 



The Needle-nosed Hop Bug. 

 (Calocoris fulvomaculatus , De Geer.) 



On one occasion only have I seen any harm sufficient to 

 call for any special comment caused by this insect in hops. 

 This was near Tonbridge in 1895, and recorded in the Journal 

 of the S.-E. Agricultural College.* Whitehead had pre- 

 viously reported two " bugs " as destructive to hop plants, 

 namely, Lygus solani and L. umbellatum, which were 

 especially noticed in 1880. The former I have never been 

 able to find in hop gardens, and the latter is the common 

 L. pratensis, Fabricius, which is found on many plants, but 

 very rarely on hops. 



In 1880 another hop bug was destructive in a small way, 

 namely, Nemocoris nemorum, Fall. This was particularly 

 noticed around Canterbury, and, in spite of statements that 

 the damage was probably caused by the Jumper (Eiiacanthus 

 interrupt us), I am convinced, from what I have seen, that 

 this bug does feed on the bine as well as upon Aphis. An 

 allied species, A. confusus, I noticed in great numbers in 

 1895, but the damage was slight compared to that caused 

 by the species dealt with here. 



No mention has been made of these insects in recent years 



* Journal S.-E. Agric. Coll. No. 2, p. n. Sept., 1895. F. V. Theobald. 



