35 



ON SOME BORNEAN FIG-INSECTS (AGAONIDAE 

 — HYMENOPTERA CHALCIDOIDEA). 



By James Waterstox, B.D., B.Sc. 

 {Published by permission of llie Trustees of tlie British Museum.) 



The following notes deal with the Agaonidae represented in a small collection 

 of fig insects formed in 1907-8, in Sarawak, by Mr. J. Hewitt, now Director of the 

 Albany Museum, Grahamstown, South Africa. 



Genus Blastophaga, Grav. 

 Blastophaga jacobsoni, Grnd. 



Blastophaga jacobsoni, Grandi, Boll. Lab. Zool. Portici, x, pp. 126 and 127, 26th 



April 1916, and ibid, xh, pp. 21-32, figs, vii-x, 1917. 

 Four $ ? " From a fig." 

 Borneo : Siol, Sarawak, viii. 1908 (/. Hewitt). 



In none of these specimens is the antenna complete beyond the sixth joint. Dr. 

 Grandi, who has at my request kindly compared this material with the type (which 

 was described from fruit of Ficus procera, Reinw., var. crassiramea, King, from plants 

 in the Botanical Garden, Buitenzorg, Java), is satisfied that it is referable to his 

 species, although the first mid-tarsal is not longer than the second, and the pilosity 

 of the thorax is not quite typical. 



The range of Ficus procera and its var., so far as I can ascertain, is Java and 

 Sumatra. The species may, however, have been introduced into Borneo. 



Genus Ceratosolen, Mayr, 



Ceratosolen hewitti, sp. nov. 



?. — Head wider (10 : 9) than long (deep). Cl3^peal lobes large and very promi- 

 nent (fig. 1, a), central tooth short, keel distinct. Distance between the lower corner 

 of the eye and the base of the mandible slightly longer than the depth of the eye. 

 Antenna, length 0-9 mm. (fig. \, b) ; the scape viewed from beneath (fig. 1, c) and 

 outwardly shows a remarkable obliquely-set thickish edge or ridge ending abruptly 

 at both extremities; process of the third joint (fig. \, b, d) distinctly articulated, 

 fourth joint short ; sensoria of the funicle numerous, only shortly free distally, those 

 on the inner aspect of the fifth joint being slightly broader than any others ; spinose 

 bristles on the inner surface of the pedicel (fig. 1 d) numerous and stout. 



Trophi. Mandible with two small teeth and swollen along the anterior edge ; its 

 ventral surface with about five ridges. Appendage (2:1) short and broad, three- 

 fourths as long as the mandible itself and half as broad, with five ridges. Stipes 

 with one lateral bristle and no free splint. 



Thorax. Protergum broadly concave posteriorly ; free striated margin broad, 

 narrower at the extremities ; whole sclerite bristly — 40 bristles, more or less, on each 

 side of the mid line. Scutellum generally with three bristles along each furrow and 

 7-8 (minute) across the middle. Propodeon (fig. 1, e) with numerous bristles round 

 the spiracle. Prepectus showing a number (6-8) of fine striae, antero-posteriorly 

 directed, on the outer two-thirds. Mainly posteriorly, the mesosternum bears 

 numerous bristles. 



Forewings twice as long as broad, length about . 1 • 125 mm. Submarginal : 

 marginal : radius : postmarginal veins approximately in ratio 33 : 9 : 11 : 14. The 



(2416) c2 



