16 



A MANUAL OF DANGEKOUS INSECTS. 



Injury: Makes galleries in al.ove plants an.l is als., injurious In timbers in houses, 

 furniture, etc. m.tribution: Australia. 



Imiknch, C Handbook of Dostruc- 

 • tive Insects of Victoria, 1S',>;'), pt. 

 2.pp.l:i(i-144,plate:52. 



I'sylla inali Schinidlii-'. 

 (Tlio .\]i\)U'. I'sylla. I'syllidir: llemiplPra.) 

 Hosts: Apple. 



Iiijtirii: Very injurious in Eng- 

 land'. 



Description and biology: Adult 

 2..")-:^ niTn. long; color variable 

 from greenish to brownish yellow 

 (some show dark markings, with 

 e\en red or yellow r. wing veins 

 greenish or greenish yellow. 

 .\yin])hs flat, at first yellow or dirty 

 > cUow, with brown markings and 

 red eyes, later becoming green all 

 over; body partly covered with 

 v.hite or pale-blue curly waxen 

 threads, and there is a long thread 

 Avith a waxy globule. Egys 

 creamy yellow, but before hatch- 

 FiG. 5. -The ulfaUa gall midge {.Uphondylia miki): AduU ing are faintly dusty red in color, 

 female, with antenna of male above, at left. Greatly en- 'j^j^^ ^vinter is passed in the egg 

 l.irged. (Original, Walton.) stage, the eggs being placed on 



the spurs, around leaf scars, in cracks, among line hairs, on the ne.v ^^ ood, and else- 

 where The nymphs hatch in spriTig as the buds begin to open and attack the 

 blossom and leaf buds, often destroying the blossoms and greatly stunting the shoots. 

 (See text fig. (1.) 



Fig. 6.— Apple psylla (I'.syll'i mnli): n, 



.Vdult; I), i 



iijurod twig; c, nymph; d, eggs on shoot. (Theobald. 



Distribution: Europe, Central Russia 

 Theobam), F. V. Insect Pests of Emit, IHOl), p. 15:i. 



