1863,] 
33 
Contributions to the Natural History of the CYNIPII)^ of the United States 
and of their galls. Article 3rd. 
BY BARON R. OSTEN SACKEN. 
Since my first articles on this subject (^on the Oynipidse of the oah^ 
in Proc, Ent. Soc, Phil., Oct. 1861, and Addition?.^ etc., ibid. Sept. 
1862), I have continued to work out the collections of galls and their 
inmates I had on hand; a large supply of materials I owe to the libe¬ 
rality of Mr. Norton. Thus I found myself able, in addition to the 
Cynipidse of the oak, described in the above quoted papers, to prepare 
one on those of the hlachherry and the rose, which I submit herewith 
to the friends of entomology. 
The present publication does not exhaust the materials contained in 
my collection and I hope, in one or two more articles, to bring them 
also before the entomological public. As all these papers, although 
disconnected, serve to complete each other, thus gradually accumulat¬ 
ing a store of materials for the future monographer, I have preferred 
to publish them henceforth under a general title. 
New York, March 6, 1863. 
Cynips-Galls on the Blackberry —(^Riihus sp.) 
The two cynipideous galls heretofore found on the blackberry bushes 
of this country are the produce of two species of the genus Diastrophus 
Hartig. This deserves to be noticed, as the first and only insect of this 
genus, described by Hartig, was also reared from a gall on the black¬ 
berry. Two more species have been described since by Mr. Giraud 
(Verb. Zool. Bot. Gesellsch. Wien, 1859, p. 368), the one reared from 
a gall on Gentaurea scahiosa, the other captured in the net. 
The genus Diastrophus, as all the other of Hartig’s genera, has not 
been defined anywhere. From Mr. Hartig’s analytical sketch (Germ. 
Z. II, p. 186, and from the addition to it, given 1. c. lY, p. 410), we 
merely gather that Diastrophus has 15 ( S ) and 14 ( 9 ) jointed an¬ 
tennae, five-articulate maxillary and three-articulate labial palpi. The 
characters taken from the number of joints of the palpi, are, in my 
