\^ol. xxix] ENTOMOLOGICAL NEWS. 205 



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-f3 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) flaveola O. S. R. polymcroidcs Alex. R. 

 tcnuipes O. S., R. neomexicana Alex. 



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



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

 Alex. ; R. cayiiga Alex. 



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



No. 10. Dicranota pallida type; radial field of the type of No. 7 

 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. Polyangaeus maculatiis 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 Ri and of R2, 

 so that the remaining vein, i?3, 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,* Tsiew Bruns- 

 wick, New Jersey. 

 This species is rather widely distributed in New Jersey, 

 having been found by the writers on alder (Alnits glntinosa) 

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

 held and in nurseries on birch iBetnla nigra, B. lulea, B. popu- 

 lifolia) at Spring-field. Elizabeth and Princeton. White birch 

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

 results. In Smith's List of the Insects of New 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. 



