346 



TMay 



20. 



21. 



f 39. C. punctata Basset! 



T „ rt1<) ■ 9- (Q. rubra.) 



Length 0.12 , 40 c po dagrae Walsh 



[ ?. (Q. tinctoria.) 



Leneth 0.07— 0.09 ' ll - C. scitula Bassett $ 



° 1 J. (Q. tinctoria.) 



The rough sculpture of the humeral parts of the collare is in dis- 

 tinct contrast with the comparatively smooth and finely sculp- 

 tured surface of the mesonotum «19 



There is no marked contrast between the sculpture of the humeral 

 parts of the collare and the mesonotum 22 



23. 



Scutellum finely rugose, opaque J "■ C. petiolicola Bassett 9 



& J ' I %. (Q. montana.) 



Basal half of the scutellum rather smooth and I 8. C. fusiformis O. 8. 9- 

 somewhat shining I (Q. alba.) 



Scutellum deeply rugose, and therefore opaque ; 1 fl „ . tr . ~ 



male abdomen nol pedunculated; bead of , °- C.seminator Harris 9 



24. 



the female reddish J £• (Q* alba -) 



Scutellum moderately rugose, and therefore more or less shining; 

 head of the female black (except the face, which in C. q. palustris 

 is reddish) 2 1 



I 0.09, 9 0.10 long i 42 - C.q. palustris O.S.fc 



* 1 9- (Q. palustris.) 



f 9. C. futilis 0. S. % . 

 (Q. alba.) 

 10. C. papillata O. S. & . 

 (Q. prinus.) 



The branch of the subcostal vein, running towards the anterior 

 margin, is obsolete; the radial area is therefore open on the inner 



side 26 



The branch of the subcostal vein running towards the anterior mar- 

 gin is distinctly marked, although sometimes abbreviated 27 



■£, only 0.05 long. 



26. 



36. 



C. operator O. S. £ 9- 

 (Q. nigra.) 



32. C.similis Bassett £ 9 

 (Q ilicifolia.) 



31. C. q. phello3 O. S. 9. 

 (Q. phellos.) 



28. 



The sheaths of the 9 ovipositor project consi- 

 derably above the dorsal line of the abdomen ; 

 % of the same coloring with the 9- both be- 

 ing brownish-red 



The sheaths of the 9 ovipositor do not projeel 

 above the dorsal line of the abdomen: the 9 

 is brownish-red or reddish-brown; the % of 

 C. gimilis is black ; the % of C. q. phellos is as 

 yet unknown 



Stout veins of the wings pale, colorless; bead 

 and thorax ( 9 ) reddish, abdomen dark brown: 

 % small in size, black 



Stout veins of the wings colored with brown, head and thorax 1 9 



brown 



Antenna; uniformly brownish-yellow; length ) 



of 9 0.06—0.07 (male unknown) j 



Antennse darker towards the tip; length of the 



9 0.0a— 0.10 



33. C. q. nigrae 0. S 



(Q. nigra.) 



%9- 



!5. C. modesta 0. S. 9 . 



(Q. rubra?) 



U. C. tumifica O.S. % 9. 



(Q. tinctoria. ) 



*This brings back to C. cornigera O. S. This species has a small smooth space 

 on the upper part of the pleura;, which might mislead those who perceive it. 

 Care has been therefore taken to arrange the table in such a manner that 

 whicheverof the two phrases under No. 16 is chosen, C. cornigera may be reached. 



