1865.] 337 



illation which Hartig has communicated to his readers about the new 

 genera introduced by him. He says that the great number of new 

 species, obtained by him after the publication of these genera, were all 

 very easily located in them. Tn his last paper (1. c. Vol. IV), the num- 

 ber of species in the different genera reaches the following figures : 

 Oynips 28, Andricus 12, Neuroterus 11, Teras 2, Biorhiza Westw. 2, 

 Rhodites 3, Diastrophus 1, Synophrus 1, Spathegaster 3, Trigo- 

 jtaspis 2. 



Since Hartig, Griraud has published numerous new species of Euro- 

 pean Ct/nipulse (Verh. Zool. Botan. Gesellsch. Wien, 1859, p. 353). 

 He did not introduce any changes nor improvements in the system, 

 except that he united the genus Teras to Andricus, the characters dis. 

 tiiiii'uishinir them being insufficient, and that he established a new genus 

 Dryocosmus. I will translate here the character of the genus and give 

 a short extract on the gall-fly. which belongs to it, as well as on its gall. 



Dryocosmus, Giraud. — "Maxillary palpi 5-jointed; labial palpi 3-jointed; 

 mandibles bidentate : antennae slightly incrassated towards the tip, 15-jointed; 

 the basal joints of the flagellum gradually decrease in length, the sixth is at 

 least twice as long as it is broad, the following joints are shorter, hardly longer 

 than broad." 



" Mesothorax convex, with deep parapsidal grooves, limited posteriorly by 

 an elevated transverse ridge; scutellum hemispherical, projecting, transversely 

 depressed at the basis and bordered on the sides by a slightly elevated ridge, 

 which becomes weaker and almost obsolete posteriorly." 



" Wings and abdomen as in the genus Cynips ; the first (what we call now 

 'second') segment occupies about half of the whole length of the abdomen." 



'•This genus is principally distinguished from Neuroterus by the structure of 

 the scutellum." 



The only species, D cerriphilus 9 ■ was obtained by Griraud from 

 a gall on Q. cerris, which, judging from his description, must be some- 

 what like the gall of 0. cornigera 0. S., only the conical points, pro- 

 jecting through the woody swelling of the limb in the latter gall, are 

 replaced here by numerous rounded, oboval or fusiform bodies, which 

 in June pierce the outer skin of the swelling. These bodies, when 

 fresh, are pale green, tinged with rosy and reddish and exude a sap of 

 which the ants are very fond. The gall-fly has a smooth shining meso- 

 notum and pleurae, a long, narrow radial cell and a distinct areolet. 



The 3tily mention 1 have to make yet, in order to complete the lite- 

 erature of this section of Cynipidse, is the genus Pediaspis Tischbein 

 (Stett. Entoui. Zeit. 1852, p. 141). The author obtained forty-two 

 female specimens, in winter, from the galls on the roots of Sorbus au- 

 cupafia. I abstain from translating the description, as it is published 

 in an easily accessible entomological review, the more so, as the charac- 



