223 



Shining black ; joints of antennae decreasing regularly in size and 

 length ; edge of labrum pale ; first tooth of mandibles sharp, curved, 

 second retracted ; tegulae, edge of collar and legs pale yellow ; abdo- 

 men much flattened ; wings hyaline ; marginal recurrent nervure 

 received nearer the third than second submaro-inal nervure. 



Five specimens ; Conn, and D. C. Resembles S. stramineipes in 

 general appearance, but is smaller. 



Tribe 3. Under-wing with one middle cell. 



13. S. ROS^, Harris, Cat. and Ins. Inj. to Veg. p. 416. Length, 

 0.20, Ex. wings, 0.44 in. 9 S . Shining black ; second joint of an- 

 tennte half as long as first, third but little longer than fourth ; second 

 tooth of mandibles retracted ; legs black, the two anterior pair dull- 

 white below the tips of the femora ; tarsi blackish. Sometimes the 

 middle tibia is black on the upper side, and the posterior tibia and 

 tarsi are whitish ; wings somewhat violaceous, darkest toward base ; 

 marginal recurrent ner\^re received on middle of third submarginal 

 segment. 



Inhabits Northern States. 



Larva twenty-two-footed ; slug-like, not slimy ; not enlarged toward 

 the head ; color pale green, beneath yellowish ; head yellowish with 

 a black dot on each side. It appears to be soft and free from hairs, 

 to the eye. It comes forth in June and August, feeds on the rose, on 

 the upper side of the leaf, not eating the veins and skin beneath. 

 But one or two are found on a leaf. 



Tliis is our most destructive species. 



The fourth section (Selandjid) does not yet seem to be represented 

 in this country. 



Descriptions of several of Harris's named Tenthredinid^. 

 By Edward Norton. 



Cladius, Illiger. 



C. isomera. Harris's Cat. Length, 0.24, Ex. wings, 0.50 in. 9. 

 Shining black ; antennae moderate ; face black ; legs dull white ; 

 femora, except at tip, tips of posterior tibise and tarsi, blackish ; wings 

 somewhat smoky, darkest toward base ; stigma large and black ; costa 

 pale, dividing nervure of costa oblique. 



Inhabits Mass. (H. Coll., 1823, and ]\Ii\ Sanborn) and Ct. 



Three specunens. I think that this belongs to section Priophorus, 

 but have seen no males. 



Lyda, Fabr. 



L. (Tarpa) script a. Say. Long's 2d Ex. 2, 312. Length, 0.44, 

 Ex. wings, 0.92 in. This belongs to section 2, Hartig. (Anterior 

 tibia without side spur.) Tribe 1. (Fourth joint of antennse much 

 longer than fifth.) 



Two specimens in Harris's CoU. from New Hampshire, 



