S. Mahunka szerk.: Folia Entomologica Hungarica 45/1. (Budapest, 1984)

Table 2. Mean + S. E. of measurements In mm of the larval Instars of Brachycaudus helichrysi (Kalt.) on plum trees at Nagykovácsi Instar First Second Third Fourth Body Ant. Siph. Cauda U.r. H.t. J. II Antenna! joints III IV 0.766 + 0.Ö18 1.023 + 0.Ö18 1.302 + 0.Ö26 1.770 + 0.Ö29 0.326 0.049 0.030 0.091 0.073 0.070 0.042 0.050+0.084 + + + + + + + + + 0.Ö02 0.Ö01 0.Ö01 O.Ö01 0.Ö02 O.ÖOO 0.Ö01 O.ÔOO 0.Ô01 0.479 0.074 0.043 0.097 0.080 0.139 0.063 0.060+0.122 + + + + + + + + + 0.Ô10 0.Ö02 0.Ö01 0.Ö01 0.Ö14 0.Ô05 0.Ö01 O.ÖOO 0.Ö03 0.631 0.101 0.053 0.102 0.095 0.218 0.078 0.075 + 0.152 + + + + + + + + + 0.Ö11 O.ÖOO 0.Ö02 0.Ö01 0.Ô01 0.Ö07 0.Ö01 0.Ö02 0.Ö02 0.806 0.128 0.060 0.109 0.109 0.174 0.121 0.098+ + + + + + + + 0.Ö21 0.Ö01 O.ÖOO 0.Ö01 0.ÖO1 0.Ö06 0.Ö05 0.002 VI Sec. rhin on III 0 0.092 + 0.192 0 + + O.Ô01 0.Ö04 Abbreviations see in Table 1. The third Instar larva: In life yellow or yellowish green in colour. In mounted specimens body oval, about 1.225-1.488 mm long. Frons sinuated as in the apterous viviparous female.Head, pronotum, antennae, legs, siphunculi and cauda sclerotized; pale brownish. Marginal tubercles and mesosternal processes absent. Antennae usually 5-jointed, about 0.4-0.5 times as long as body. Length of antennái joint from the third to the fifth as: 0.190-0.240, 0.070-0.080, 0.070-0.080 for basal part and 0.145-0.160 for unguis, usually without secondary rhinaria on the third joint and with 3-8 hairs. Processus terminális 1.8-2.3 times as long as base of joint V, and 0.6-0.8 times the length of joint III. Tip of rostrum generally reaching beyond the middle coxae; ultimate rostral joint about 0.100 to 0.105 mm long, about 1.0-1.2 times as long as second Joint of hind tarsi. Siphunculi cylindrical or tapering, with a circular incision below the well-developed flange, about 0.100-0.105 mm long, 0.07-0.09 times as long as body length and about 0.040-0.060 mm long, about 0.4-0.6 times as long as its basal width, bearing 4-5 hairs. Legs bearing numerous fine hairs. Hind tarsal joint II about 0.090-0.100 mm long. First tarsal chaetotaxy: 3, 3, 2. (Measurements see In Table 2.) The fourth Instar larva: In life yellow or yellowish green in colour. In mounted specimens body oval, about 1.659-1.953 mm long. Dorsal sclerotization as In the third instar larva.Marginal tubercles absent on mesothorax; mesosternal processes absent. Tergite VIII with 8-10 hairs, mostly with filamentary apices. Antennae 6-jointed, about 0.4-0.6 times as long as the body. Length of antennái joint from the third to the sixth as: 0.150-0.210, 0.100-0.150, 0.080-0.100, 0.0850.100 for basal part and 0.170-0.210 for unguis; usually without secondary rhinaria on the third joint and with 3-6 hairs. Processus terminális 1.7-2.5 times as long as base of joint VI, and 0.81.4 times the length of joint III. Third antennái joint divides during moulting, giving the third and the fourth joint. Tip of rostrum generally reaching to the middle of second coxae; ultimate rostral joint about 0.105-0.110 mm long, about 1.0-1.1 as long as second joint of hind tarsi. Siphunculi conical or tapering, with a circular incision below the well-developed flange, about 0.120-0.130 mm long, 0.06-0.08 times as long as body length and about 1.1-1.3 times the length of second joint of hind tarsi. Cauda semicircular, about 0.055-0.060 mm long, about 0.4-0.5 times as long