316 JAMES WATERSTON. 



situated. Propodeon with 3 short descending median rugae flanked on each side 

 by one or two incomplete cells ; 3-4 rugae before the spiracle, which is nearly 

 circular and of moderate size. Metapleurae with 9-10 bristles. 



Wings. Fore wings (fig. 3, a) 2h times as long as broad, length 1-07 mm., breadth 

 •43 mm. Submarginal : marginal : radius : postmarginal, as 40 : 10 : 5 : 3^ ; i.e., 

 the marginal is relatively longer than in E. pattersoni. Compared with that 

 species also there are 1-2 fewer bristles on the submarginal vein and all the major 

 bristles on the neuration are a little shorter ; 2 bristles on the radius, 1 near base 

 and 1 sub-apical ; 6-8 long bristles inferiorly at the apex of the submarginal cell. 

 The conspicuous differences in the chaetotaxy of the wing-bases of cornigerum, 

 ilalicum (fig. 4) and pattersoni are figured. Hind wings, length '78 mm., breadth 

 •19 mm. ; 11 bristles on apical half of the neuration. Both wings, especially the 

 posterior pair, are distinctly narrower than in pctttersoni. 



Fig. 4. Eusemioyi italictim, Masi, $ ; 

 basal half of fore wing. 



Legs. Fore legs with the femur (4:1) broader than in pattersoni. Femur of 

 mid legs a little over 5:1; the tibia not quite 5| times as long as broad ; aj)parently 

 fewer heavy spines on the first tarsal joint. Hind tibial comb as in patter soni. The 

 first and second tarsal joints of the mid and hind legs are 'in ratio 3:2, the first 

 joint being relatively shorter than in patter soni. 



Abdomen (9 : 8) with the sheath projecting between one-seventh and one-eighth 

 of the length of the abdomen. Dorsal surface medianly smooth, faintly reticulate 

 laterally and narrowly towards the middle behind the setigerous process. On the 

 first tergite are two narrow transverse widely separated belts (each occupying about 

 one-third of the total breadth) of small much raised cells wuth thickened walls, 

 which produce a slight refringence. 



Length, about 1 mm. ; alar expanse, l|-2 mm. 



Britain : Surrey, Camberley, jbred from the Coccid Parafairmairia gracilis, 

 viii. 1915, 4 ?? (^. E. Green). 



There are apparently no Walkerian examples of this species in the British 

 Museum, and I am not aware of any recent records of E. cornigerum. Haliday's 

 figures (Entom., 1841, pi. H., figs. 2, 2, a), though on too small a scale to convey 

 much information, are fairly satisfactory. Walker records the species from the Isle 

 of Wight and Fontainbleau. Mayr (Verb, zool.-bot. Ges. Wien, xxxv, 1876, p. 749) 

 records cornigerum from Coccids on Prunus and states that Kreichbaumer reared 

 a female from a Coccid on grass. Parafairmairia is also a grass Coccid. 



