REYNVAANIA GALLICOLA, A NEW ERIOCOCCID CAUSING GALLS ON QUERCUS LINEATA BL. BY A. REYNE Atnsterdatn DocTERS VAN Leeuwen-Reynvaan and DocTERs VAN Leeuwen (1926, 19411) have described 1930 different species of zoocecidia from Indonesia, col-lected from 1908 till 1932, during their residence in Java; 68 of these galls are ascribed to coccids. These coccid galls are usually common malformations which consist of a shortening or swelling of the internodes, combined with bunching of the leaves; occasionally real witches' brooms are formed as in Lansimn domesticum Jack (gall Nr. 644). Sometimes the leaves are curled and crumpled. In a few cases peculiar horn-like excrescences are found on the leaves, as in Homdanthus popul-neus Pax (Nr. 761), Claoxylon indicum Hassk. (Nr. 709)2), and Santalum al-bum L. (Nr. 1624). The entomologist, who is not a specialist in galls, will usually apply the name gall only to a typical malformation, inhabited by some stage of the insect that caused the gall and feeds upon it. Most of the coccid galls, described in the above-mentioned papers, he would simply call malformations, but he would certainly apply the name gall to the malformations on young oak twigs caused by the Eriococcid3) from Java and Sumatra which is described in the present paper. This gall was described as follows (D. v. L. 1941, p. 135): Nr. 1571. Quercus lineata Bl. A bud gall caused by a coccid. The terminal buds of the thin twigs are changed into a red-brown, plushy ball, 7 to 12 mm across. Sometimes full-grown leaves are attached to the galls. A white coccid lives inside; the wall is covered with a thick mass of red-brown hairs. Gall Nr. 21764. Java, Mt. Tangkoeban Prahoe near Ban-doeng, alt. 1600 m, VII-1927; Mt. Papandajan, alt. 1400 m, J. Labohm coll., III-1932; Sumatra, Tapianoeli, Simakoek, alt. 1000 m, Forest Experimental Station leg., VII-1928. On closer inspection it appears that the gall in question consists of a thick cluster of radially arranged buds, in which the scales are provided with a large number of long, flat, red-brown hairs, so that the gall resembles a plushy globule. ^) Their papers are quoted in the following pages as: D. v. L. 1926, 1941. Gall numbers quoted refer to the serial numbers of the galls, not to their herbarium numbers. ^) The names which are valid at present are as follows. 1. Lansium domesticum Corr. (1807); Jack (1823). 2. Claoxylon polot (Burm. f., 1768) Merr. Syn. CI. indicum Hassk. (1844). 3. Homalanthus populneus (Geisel.) Pax or Omalaiithus populneus (Geisel.) O.K. The last mentioned genus was originally named Omalanthus, but afterwards the name was usually written Homalanthus. It has not yet been decided which name should be regarded as correct. I am indebted to the Rijksherbarium of Leiden for this information. **) Eriococcus and allied genera are assigned to the family Kermidae in the system of Ferris (1937), to the fam. Eriococcidae (subfam. Eriococcinae) by Balachowsky (1942), and to the fam. Pseudococcidae (subfam. Eriococcinae) by Borchsenius (1949). 233
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