June, ip^o.l Petruxkevitch : Orchestina saltitaxs. 157 



191 o 



I9I3 

 I9I6 



1917 

 I8S6 



BlBLIOGR.\PHY. 



Fall. Journ. New York Ent. Soc, XVIII, p. 50. 

 Woodworth, Guide to California Insects, p. 196. 

 Van Dyke, Ent. News, XXVII. p. 410. 

 Chamberlin, Ent. News, XXVIII, p. 139. 

 Horn. Trans. Anicr. Ent. Soc, XIII, p. 7. 



EXPLANATION OF PLATES. 

 Plate YU. 

 Fig. I. Adult and pupa of Clirysobothris sylvania Fall, in their cells in 

 sapwood of Douglas fir. Natural size. 



Fig. 2. Full grown larvae of Clirysobothris sylvania. attacked by larvae of 

 an ichneumonid. Slightly enlarged. 



Fig. 3. Same as fig. 2, greatly enlarged. 



Plate VIII. 

 Fig. I. Cross sections of the larval mines of Melasis rufipennis, about 

 natural size. Note the adult emergence hole near center. 



Fig. 2. Grand fir wood showing longitudinal sections of the mines. 

 Fig. 3. Adult of Melasis rufipennis Horn. (Greatly enlarged.) 

 Fig. 4. Pupae of M. rufipennis Horn. (Greatly enlarged.) 

 Fig. 5. Larva of M. riifipouus Horn. (Greatly enlarged.) 



DESCRIPTION OF ORCHESTINA SALTITANS BANKS. 

 (ARACHNIDA.) 



By Alexander Petruxkevitch, Ph.D. 



The family Oonopidae is very poorly represented in the United 

 States. Banks has described in 1893 one species of Gamasomorpha 

 from Florida (G. floridana), and in 1894 a species of Orchestina 

 from New York (O. saltitans). In 1909 Emerton described a male 

 from Massachusetts, which he identified as O. saltitans. In 1910 I 

 identified a male caught in Xew Jersey as O. saltabtinda Simon, 

 a species occurring regularly in Venezuela. Comte de Dalmas has 

 published a revision of the genus Orchestina in Annales de la Societe 

 Entomologique de France in 19 16. He makes the suggestion that the 

 spider described by Emerton is not an Orclicstiiia, but a Tapinesthis. 

 closely related to Tapinesthis i)ier]nis Simon, a spider found fre- 



