384 Bulletin 265. 



without apparent sculpture and the hairs are very sparse and microscopic 

 in size (Fig. 88). The inner margin of the mandibles is provided with 

 three sharp teeth. 



The pupa is yellowish white and in the female has the ovipositor 

 curved over the back and reaching to about the middle of the thorax. 

 Length of female pupa, 3 mm.; of male, 2.5 mm. 



The adult female (Fig. 85) is brownish yellow with the face and hind 

 margin of pronotum yellow. The ovipositor is as long as the body, 

 dusky in color and usually strongly curved. The wings are clear with 

 dark brown veins. The antennee are dusky; scape yellowish. The 

 male (Fig. 86) is much lighter in color; the head, pronotum, pleurag and 

 coxae yellow; mesonotum, scutellum and abdomen tinged with brown; 

 postscutellum at the sides, propodeum in the middle and basal segments 

 of abdomen above, dark brown; pronotum and mesonotum each with 

 a transverse brownish band in front. 



We have been unable to make any observations on the habits of this 

 insect under natural conditions. The holes through which the adult 

 insects escape from the seeds are shown in Fig. 89. 



THE GRAPE-SEED CHALCIS 



(Evoxysoma vitis Saunders) 



The injury caused by this insect first attracted attention in 1868. 

 In August of that year William Saunders," then of London, Ontario, 

 noted a shriveling of many berries on a Clinton vine growing at that 

 place. On opening these berries he found that they contained only 

 one or two seeds which were as a rule abnormally large and that the 

 kernel of each seed had been devoured by a small white footless grub 

 which he mistook for the larva of some Curculio. 



He states that about ten per cent, of the berries on the Clinton vine 

 were shriveled up and rendered worthless, but a further examination 

 showed that the seeds in many of the apparently normal berries were 

 also infested. He also found that the seeds of the following varieties 

 were more or less infested: Delaware, Isabella, Rogers' No. 4 and an 

 unnamed seedling. 



The next year Saunders succeeded in rearing the adult insect which 

 he described as a new species under the name of Isosoma vitis .^^ Writing 



1^ Report Com. Ag. Arts Prov. Ont. for 1868, pp. 203-205. 



Can. Farmer, Oct. 15, 1868, p. 316. 



Can. Ent., I., pp. 20, 21, 1868. 

 "Can. Ent., II., pp. 25-27, 1869. 



