mens of Harris's si)ecies with the European Gladhis i^ectinicornis Fourcr.* 

 ]3roves the two species to be identical. The hitter differs in fact in no 

 important feature from, and has recorded of it the same larval charac- 

 teristics and habits, as the American si')ecies. The old name isomera of 

 Harris must give place to the name given by Fourcroy at a nuich earlier 

 date. The introduction of this common European i)est of the Eose 

 doubtless took lolace at an early i)eriod. The hibernating larva3 at the 

 base of the plants, or attached to the stems in their parchment-like 

 cocoons, afford an easy method of introduction, and it would indeed 

 have been remarkable if such introduction had not resulted. 



Since the first discovery of the larv?e in 1880 the insect has persisted 

 on my rose-bushes, and seems to have steadily increased in the city of 

 Washington. It has also been found in other parts of the country. Its 

 wide distribution and its rose-feeding habit are shown by the following 

 records : 



; 



Fig. 2. — Cladius pectinicornis : a, egg; &, portion of leaf showing eggs iri situ and work of young 

 larvse ; c, newly-hatched larvae ; d and e, lateral and dorsal aspect of middle segment of same : /, larval 

 claw ; g, rose leaf showing nature of defoliation ; all except g enlarged (original). 



In May, 1886, a female of this species was discovered by Mr. F. M. 

 Webster, at La Fayette, Ind., just in the act of oviposition, and in 

 September, 1887, the larvae were observed on some roses at Richfield 

 Springs, 1^. Y.; while in the fall of 1889 Miss Murtfeldt found the 

 larvoe at Kirk wood, Mo., and gave in Bulletin 22 of this Division a brief 

 account of their habits. 



Its mode of work is quite unlike that of the common Rose Saw-fly 

 {Monostegia rosce). Instead of feeding like that spfecies, during its 

 whole larval existence, exclusively upon the upper epidermis of the 

 leaves, these larv?e while quite small feed upon the lower side only. 

 Gradually, however, as th&y become larger, they eat irregular holes all 



•^ Ent., Par. II, p. 374 (17^ 



