Vol. XXIX | ENTOMOLOGICAL NEWS. 2O5 



No. 6. The inconstans type. Often the r-m cross-vein connects di- 

 rectly with the sector before its fork, as shown ; cell R3 is usually 

 short-petiolate, reins R2+3 being fused with R4 for a short distance. 

 Species included : 



Tricyphona inconstans (O. S.), T. constans (Doane). 



No. 7. The type of Rhaphidolabis tcnuipcs; the condition of the 

 radial field not unlike the last. Species included : 



R. (Rhaphidolabina) fla-reola O. S. R. polymcroides Alex. R. 

 tcnuipcs O. S., R. ncomexicana Alex. 



No. 8. R. modesta types ; cell R3 sessile. Species included : 



R. (Plectromyia) modesta O. S. R. sessilis Alex. R. rubesccns 

 Alex. ; R. cayuga Alex. 



No. 9. R. major Alex. ; cell R3 very short-petiolate. 



No. 10. Dicranota pallida type; radial field of the type of No. / 

 but the true radial cross-vein present. Species included : 



D. pallida Alex. D. argcntea Doane; D. noveboracensis Alex. D. 

 rivularis O. S.; D. euccra O. S. Polyangacus maculatus Doane. 



If the above interpretation of a backward fusion of Ri 

 with R2 is the correct one, as certainly appears from the data 

 now available, it is the first case of such a fusion in the Tipu- 

 lidae, the apparent fusion in the Cylindrotominae being no fu- 

 sion at all but an atrophy of the tips of veins R I and of R2, 

 so that the remaining vein, R$, simulates a long fusion of Ri + 

 2 + 3 back from the wing-margin. 



The early Stages of Corythucha pergandei Heid. 



(Hem., Horn.). 



By HARRY B. WEISS and EDGAR L. DICKERSON,* New Bruns- 

 wick, New Jersey. 



This species is rather widely distributed in New Jersey, 

 having been found by the writers on alder (Alnns ylntinosa) 

 at Trenton, Morris Plains, Lakehurst, Jamesburg and Plain- 

 tk-ld and in nurseries on birch (Betitla uigra, B. litiea, B. popu- 

 li folia) at Springfield, Elizabeth and Princeton. White birch 

 (B. alba) was examined at numerous localities with negative 

 results. In Smith's List of the Insects of Mew Jersey it is 

 further recorded from Roselle Park by Barber and from 



* The arrangement of the authors' names has no significance and in- 

 dicates neither seniority nor precedence. 



