154 
IOWA ACADEMY OP SCIENCES. 
16. Pachypsylla celtidis-mamma, Kiley. (Ames, la.) 
Psylla celtidis-mamma, Riley. 
17. Pachypsylla (Blastophysa). celtidis - gemma, Riley, 
(Ames, la.). 
18. Pachypsylla celtidis-cucurbita, Riley. 
19. Pachypsylla celtidis-pubescens, Riley. 
20. Pachypsylla celtidis-asteriscus, Riley. (Ames, la.). 
21. Pachypsylla celtidis-iimbilicus, Riley. 
22. Pachypsylla celtidis-vesiculum, Riley, v (Ames, la.). 
23. Pachypsylla celtidis- inteneris, Mally. (Ames, la.).^ 
IV. SUB-FAMILY TRIOZIN^. 
24. Trioza tripunctata, Fitch. 
Psylla tripunctata, Pitch! 
Pyslla rubi, Walsh and Riley. 
25. Trioza diospyri, Ashm. 
Psylla diospyri, Aslim. 
26. Trioza magnolia, Ashm. 
Psylla magnoUce, Ashm. 
27. Trioza sanguinosa, Riley. 
28. Trioza sonchi, Riley. 
29. Trioza pyrifoliaa, Forbes®. 
30. Ceropsylla sideroxyli, Riley. 
31. Rhinopsylla schwarzeii, Riley. 
Thus we see that we have now thirty-one species on record. 
While studying the group last season, a number of species 
were found that heretofore had not been mentioned or des- 
cribed. One found very numerous on Polyganum agrees very 
well with the European species Aplialara polygoni. Another 
species found on Ash at Jamaica, Long Island, is apparently 
identical with the European species Psylla unicolor, also found 
on Ashl 
4This species was first mentioned by the author in Proc. la. Acad. Sci., (1893), vol. 
1, part IV, p. 138. 
5In an abstract of Dr. O. V. Riley’s paper on “The Psyllidee of the United 
States,” PhyUo'plecta tripunctata is mentioned as occurring on the blackberry. This 
apparently is the same as Trioza tripunctata as mentioned in the list, except that a 
new genus has been designated. Not having seen the complete paper, however, I can- 
not say whether it is the same species or a new one which also infests the blackberry. 
6This species was first mentioned and described by Prof. S. A. Forbes in the 
14th 111. Kept., (1884), p. 98. 
7The specimens were sent to me by Mr. F. A. Sirrine, Entomologist in the N. Y. 
State Exp. Sta. 
