S. Mahunka szerk.: Folia Entomologica Hungarica 34/1. (Budapest, 1981)
c/ Winged form is 1.1-1.2 mm long and 0.35-0.45 mm wide, with a 9-segmented antenna. The one pair of wings is sometimes distorted, shrunken. The thoracal spiracles are well developed, legs are long, slender and covered with strong setae. Discoidal pores are only In the cerarium next to the genital apparatus. The two setae originating from this region are longer than the genital organ. The body is provided with setae on both sides (Fig. 9). Female: The morphology corresponds basically with the description of KIRITCHENKO (1940) and TEREZNIKOVA (1975). The females collected in Hungary from Acer campestre are elongate, with a pink colour. The body is 1.2-1.6 x 3.0 mm. The antenna is 8-9 segmented; measurements of the 9-segmented one: 1st: 34.7; nhd: 31.2; Illrd: 25.2; IVth: 22.0; Vth: 22.0; Vlth: 25.2; Vllth: 27.0; VIRth: 25.2 and Dithe: 50.4 microns. The eyes are well developed; the labium Is also well developed, three-segmented, with its end reaching to the second coxae. The stylet loop is as long as the body or longer. The legs are well developed, thick, the claws are with a denticle each. The claw setae are longer than the claw, diBtally slightly distended. The thoracal spiracles are short, next to them no discoidal pores are found. Anterior dorsal ostiole absent, the posterior ones are well developed. From the 5 ventral circuli the first one is the smallest; their horizontal diameter is as follows: 1st: 18.9; Und: 44.0; IRrd: 45.1; IVth: 44.1; Vth: 37.8 microns. The anal opening contains a thin-walled and a double-walled pore ring and 6 setae. The anal appendix is undeveloped. The anal seta is 0.11 mm long. Ceraria absent. On the place of C-18 two thicker and some thinner setae, 9-12 trilocular pores are found. The discoidal pores are 3-, 4-, 5- and multilocular. The multilocular ones form on the 3-6th tergites and on the 3-5th sternites rows, on the 6-8th sternites stripes. The 5-locular pores are scattered on the ventral side of the body and on the dorsal abdominal segments. Four-locular pores are scattered in a low number on the ventral side; 3-locular ones are found also scattered, in small numbers on both sides of the body. The tubular ducts belong to the same type, in larger numbers on the posterior half of the body: the pame are singly on the ventral side of the céphalothorax, on the 2-6th abdominal sternite In transverse rows, on the 7th sternite in an interrupted row. These tubular ducts form 4 transverse rows on the tergite of the céphalothorax, and single rows on each abdominal tergite. The setae are short, slender, in low numbers on both sides of the body; no spines are found. Development The species overwinters as Li and L2 larva in the bark crevices, branch forks' under dead scales (e.g. Parthenolecanium corni) and in felt-like formations caused by Acanthococcus aceris. By the beginning of the vegetation period from early April the mature males and females appear. The females having developed in different periods lay eggs from the beginning of May until the end of June. The females lay 60-120 eggs among loose wax filaments. The presence of the scales is the most conspicuous at that time. The larvae hatch after 12-16 days and settle down on the lignified parts In bark cracks. The young larvae reach their maturity by the beginning of July. The pronymphs and nymphs develop In cocoons made from loose wax filaments. According to the data presented In the morphology, three male morphs occur, in the first generation, however, only neotaenic males were observed. The two generations overlap considerably; tha larvae of the second generation hatch in August and September. Host plants The main hosts are Acer species, especially Acer campestre, A. platanoldes, but it may occur also on the bark of Aesculus hippocastaneum (Kosztarab, 1959). The species has been described in the Ukraine from the same hosts (Tereznikova, 1975). Natural enemies KOSZTARAB (1959) mentioned among the natural control factors the parasitoid Pseudaphycus hungaricus Erdős (Encyrtidae) . From the large number of scales Investigated on the Acer trees only few were parasitized; among the episites Coccinellid and Syrphid larvae were observed which fed both on s cale larvae and adults .
