S. Mahunka szerk.: Folia Entomologica Hungarica 44/2. (Budapest, 1983)

DESCRIPTION OF DIFFERENT STAGES OF BRACHYCAUDUS SCHWARTZI I) Apterous viviparous female In life olive green to olive greenish brown in colour, abdominal tergites forming a black or brown patch. In mounted specimens body elongate oval (Fig. 1), about 1.829 to 2.186 mm in length. Compound eyes about 3.2 times longer than triommatidion, consisting of about 60-72 ocelli. Frons slightly sinuated, median frontal tubercle a little posterior than lateral frontal tubercles. Antennae usually 6 jointed, about 0.45-0.74 times as long as the body, with joint I and II brown. Flagellum from the pale joint IH and IV gradually darker towards the base of joint VI; processus terminális gradually slightly paler towards apex. Length of antennái joint from the third to the sixth as: 0.260-0.370, 0.160-0.260, 0.110-0.150, 0.080-0.120 for the basal part and 0.275-0.380 for the unguis, respectively. Processus terminális 2.3-4.8 times as long as base of joint VI, and 0.7-1.5 of the length of joint III. The third joint without secondary rhinaria and with 6-10 hairs. Tip of rostrum generally reaching beyond the middle coxae; ultimate rostral joint about 0.125-0.140 mm long, 0.9-1.1 times as long as second joint of hind tarsi. Head and thorax sclerotized and pigmented brown in colour. Legs, compound eyes, siphunculi, cauda, and genital plate brown. Transverse rows of indistinct imbrication on abdominal tergites anterior to the siphunculi. Metanotum fused with abdominal tergites I-VII forming a brown patch, the chitin structure of the abdominal tergites is striped and the segment limits obvious. Marginal tubercles absent on mesothorax; mesosternal processes conspicuous, oblong shaped. Marginal tubercles absent on metathorax and abdominal tergites; and spinal tubercles absent on abdominal tergites VII and VIH. Tergite VUI with 6 hairs, mostly with filamentary apices, placed in a row on posterior margin of sclerotic part of this segment; longest of these hairs 0.045-0.070 mm long, 1.5-2.3 times as long as basal diameter of antennái joint III. Longest hairs on antennái joint III 0.005-0.007 mm long, 0.16-0.23 times as long as the basal diameter of this joint. Siphunculi conical and smooth with faint traces of several imbrications, with a circular incision below the well developed flange, 0.110-0.160 mm long, about 0.05-0.09 of the body length, about 0.8-1.2 times the length of second joint of hind tarsi. Cauda dumpy, pentangular shaped, about 0.080-0.105 mm long, bearing 4-7 hairs, about 0.6 times as wide at base as its length. Legs bearing numerous fine hairs. Hind tarsal joint II about 0.130 to 0.140 mm long. First tarsal joints with 3,3,3 hairs (Table 1.). As shown in Table 1. there are remarkable variations in the measurements of the various organs between the two localities (Measurements see Table 1.). II) The larval instars in Nagykovácsi The first instar larva: In life yellow in colour. In mounted specimens body oval, very small about 0.770-0.885 mm long. Frons slightly sinuated, median frontal tubercle a little lower than lateral frontal tubercles. Head and pronotum sclerotized; meso- and metanotum membraneous. Transverse rows of imbrication on abdominal tergites absent, membraneous. Antennae usually 5 jointed, about 0.3-0.5 times as long as the body. Length of antennái joint from the third to the fifth as: 0.060-0.090, 0.040-0.050, 0.045-0.055 for the basal part and 0.090-0.095 mm for the unguis, without secondary rhinaria on the third joint. Processus terminális 1.6-2.1 times as long as base of joint V, and 1.0-1.6 of the length Of joint III. Tip of rostrum generally reaching to the middle of hind coxae; ultimate rostral joint about 0.090-0.095 mm long, 1.0-1.2 times as long as second joint of hind tarsi. Siphunculi cylindrical, very small, about 0.035-0.040 mm long, about 0.04-0.05 of the body length. Cauda semi-circular, very small, about 0.030 mm long, bearing 2 hairs, about 0.4 times as wide at base as its length. The larva in this instar has six well developed legs, bearing numerous fine hairs. Hind tarsal joint II about 0.080-0.090 mm long. First tarsal joint with 2,2,2 hairs (Measurements see Table 2.). The second instar larva: In life yellow in colour. In mounted specimens body oval, about 0.910-1.209 mm long. Frons slightly sinuated, median frontal tubercle a little lower than lateral frontal tubercles. Head, pronotum, antennae and legs sclerotized; other thoracic tergites and abdominal ones colourless. Siphunculi and cauda brown. Transverse rows of imbrication on abdominal tergites absent. Antennae usually 5 jointed, about 0.3-0.6 times as long as the body. Length of antennái joint from the third to the fifth as: 0.085-0.155, 0.055-0.060, 0.050-0.070 for basal part and 0.090-0.155 for processus terminális, without secondary rhinaria on the third joint.