1865.] 385 



A. Antennae articulis incequalibus, ultimis 7-8 brevioribus, cla- 

 vam elongatam constituentibus. 



a. Scutellum hsemisphericum. 



1. Thoracis dorso villoso. 



Palpi max. 5 artic: palpi labiates 3 art Cynips. 



2. Thoracis dorso nudo, plerisque coriaceo. 



Palpi max. 5 art. : lab. 2 artic Andricus. 



3. Thoracis dorso nudo, plerisque lsevigato. 



Palpi max. 4 art., lab. 2 art Neuroterus. 



b. Scutellum depressum, planum. 



4. Palpi max. 4 artic, lab. 2 artic Teras. 



c. Scutellum subnullum (apterus). 



5. Palpi max. 5 art., lab. 3 artic. ultimis appendiculis 



conicis coronatis Apophyllus. 



(—Biorhiza Westw.) 



B. Antennae setaceae, 15 — 16 articulate. 



6. Palpi max. 4 art, lab. 2 art Rhodites. 



7. Palpi max. 5 art., iab. 3 art., articulis ultimis appen- 



diculis parvis lateralibus Diastrophus. 



C. Antennae fili formes, 15 — 16 articulatae. 



8. Thoracis dorso coriaceo. 



Palpi max. 5 art., lab. 3 art Spathegaster. 



9. Thoracis dorso laevissimo. 



Palpi max. 5 art., lab. 2 art. articulis ultimis ap- 

 pendiculis coronatis Trigonaspis. 



This is all that Hartig's first article on Cijnipidse (Germ. Zeitschr. 

 II, p. 176) affords towards a definition of the genera. 



His second article (1. c. Vol. Ill, p 322) contains on pages 330 and 

 331 some few additional remarks, among which the only important one, 

 is the following : — " The phrase in the tabular arrangement of the 

 genera ' A. Antennae articulis insequalibus, ultimis 7 — 8,' etc , refers 

 only to the female sex, as the males of the bisexual genera Andricus 

 and Teras have filiform antennae with more or less coarctate, sometimes 

 even (A. moniliatus) rounded joints. These males might therefore be 

 confounded with those of the genera Spathegaster, Rhodites, Trigo- 

 naspis and Diastrophus, if the £ of Spathegaster were not distinguish- 

 able by the abdomen, which is attached to a long peduncle, the % of 

 Rhodites by the closed radial area. At the same time, there exists the 

 most remarkable resemblance between the males of Andricus and Tri- 

 gonaspis, two genera which are so easily distinguished in the female 

 sex by the structure of the antennae. The only easily noticeable differ- 

 ences are that Trigonaspis has the single antennal joints cylindrical, 

 Andricus more or less truncate-ovate; that the scutellum of Trigonas- 

 pis is larger, narrower, ending in a sharper point, and especially that 

 it is more deeply excavated and more porrected over the abdomen, than 

 in Andricus. The lateral tubercles of the scutellum of Trigonaspi* 



