1S64.] 45 



eued. It must be that the 9 9 '^""^ impregnated at this time, and that in the 

 middle of June, as I have already observed, the viviporous young are hatched 

 from the body of the parent. I do not see that the presence of this Stylops 

 necessarily kills the bee or wasp, unless there are five or six individuals within 

 the same bee-body." 



The following papers were presented for publication : — 



" Descriptions of several new N. A. Coleoptera. by Jas. H. B. Bland." 



" Descriptions of N. American Lepidoptera. No. 3, by Aug. R. Grrote." 



'• List of a Collection of Lepidoptera Heterocera, taken near Wil- 



liamstown, Mass., by Aug. R. (Irote." 



'' Synopsis of the Bombycidse of the U. States, by A. S. Packard, Jr." 



•' Descriptions of North American Hymenoptera, by E. T. Cresson." 



And were referred to Committees. 



On report of the respective Committees, the following papers were 

 ordered to be printed. 



Description of several new North American CTENOPHOR.ffi. 

 BY BARON R. OSTEN SACKEN. 



Five species were enumerated in my Catalogue of the descrHjed 

 diptera of North America, under the head of Ctenophora. Subse- 

 quent investigations have proved that two of them, C. fuUginosa Say, 

 and C. ahdominalis Say, are true Tipulae. C. Parrii Kirby, seems 

 also to be a Tlpida. The two remaining species G. dorsalis Walker, 

 and C. succedKiix Walker, may perhaps be identified with two of the 

 new species described below, although this identification, as will be 

 shown, is by no means certain. 



L Antennse of the male with four rows of branches, the tiro larger 

 ones on file outside, the two smaller ones on the inside ; antennse of the 

 female rather short, serrated ; male genitals clavate, but of moderate 

 size ; female ovipositor short. 



C. nubecula n. sp. % 9- 



Flavo-ferruginea. thorace ex maxiiua parte flavo, vitta media fused, cunei- 

 form i ; alls subhyalinis, stigmate flavo, nebula substigmaticali majori, fusca. 



Ferruginous-yellowish, thorax for the most part yellow, with a cuneiform, 

 brown intermediate stripe : wings almost hyaline, stigma yellow, a rather 

 large brown cloud close behind the stigma. 



Long. Corp. %().oo, 9 0.8; long al. -^ 0.5.x 9 0.62. 



