87 



ARTICLE III.— ON NEW INSECT ENEMIES OF THE BLACK- 

 BERRY AND RASPBERRY. 



1. The Blackberry Leaf Miner. 



{Metalliis riibi, gen. efc sp. nov.) 



Order Hymenoptera. Family Tenthredinid^. 



(Plate IX. Fig. 7.) 



On the 12th August, at Normal, Mr. Garman found mining the 

 leaves of cultivated blackberries, small white larvae with brown heads, 

 which transformed early in September to small saw flies, one spec- 

 imen emerging on the 9th and another on the 10th of that month. 

 The transformations occurred in the earth, the larvee having deserted 

 the leaves as early as September 6. 



DESCRIPTION OF GENUS. 



Anterior tibiae with a single spine, other tibia? with two ; antennae 

 nine-jointed, third joint longer than the fourth, but not twice as long. 

 Head short, about as wide as the thorax ; the latter subglobular ; 

 anterior wings with two marginal and three submarginal cells, the 

 basal marginal the smaller, the first submarginal curved, longer than 

 the second, the third largest of all ; lanceolate cells petiolate. 



" DESCRIPTION OF SPECIES. 



7/Hrtfyo.— Head, thorax, and abdomen shining black, clothed with 

 short yellowish pubescence ; antennae sparingly j)ubescent, strongly 

 compressed, third joint about five and a half times the length of the 

 fourth, fourth and fifth equal, sixth, seventh, and eighth successively 

 a little shorter, the ninth longer than the eighth ; legs pale, all the 

 femora and the posterior tibia" fuscous ; wings smoky, almost black, 

 wing veins black, but slightly tinged with fulvous. Length, 3.5 mm. 

 expanse, 8.5 mm. 



Described from tW'O specimens bred from blackberry leaves. 



Larva. — The larva is 8.5 mm. in length by 1.25 mm. in breadth, 

 cylindrical, skin minutely roughened. The second and third thoracic 

 segments and the first abdominal are much thickened vertically, 

 giving a convex dorsal outline to this region. From the second 



