﻿96 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lOO 



absent in males and sometimes large enough to invade the cubital 

 cell and the extreme base of the radial cell; legs beyond coxae or first 

 trochanters ferruginous to black; first abdominal segment except 

 basally and more or less of the basal part of the second segment 

 ferruginous. 



The description of Aulacus niger Shuckard is too brief for a certain 

 identification and its type is lost. Westwood (Trans. Ent. Soc. 

 London, vol. 3, p. 265, 1843) synonymized niger with his own ater, 

 and his disposition of the name is followed. A male from Tyler 

 County, Tex,, and a female from Homestead, Fla., are unusual in 

 extensive wing markings and an unusual amount of ferruginous color. 

 Possibly they represent a distinct race. The type of Pristaulacus 

 floridana Rohwer belongs to this form, and J. F. Perkins's notes on 

 the type of Aulacus abbottii Westwood indicate that it belongs here too. 



Specimens. — ScT, 319, from Alabama (MobUe); Colorado (El 

 Paso County); Florida (Homestead); Manitoba (Victoria Beach); 

 Maryland (Cabin John and Glen Echo); Massachusetts (Spring- 

 field) ; Michigan (Agricultural College and Baraga County) ; Minne- 

 sota (Cass County and Itasca) ; New York (Albany, Bath, Ithaca, and 

 Pine Lawn on Long Island) ; North Carolina (Bent Creek at Ashe- 

 vUle, and Durham); Pennsylvania (Philadelphia and Rockville); 

 Quebec (Joliette, Laniel, and Norway Bay); Texas (Doucette in 

 Tyler County) ; and Virginia (Falls Church) . Dates of capture are 

 mostly in June, July, August, and September. Those outside this 

 range are two females taken at Mobile, Ala., by E. C. Van Dyke on 

 December 12 and January 3. Specimens from four localities bear the 

 note that they were collected on or reared from Pinus. 



This species occurs from the Atlantic west to about the one-hun- 

 dredth meridian from the Canadian Zone to the Lower Austral Zone, 

 and it has beea taken also in eastern Colorado. It is associated with 

 Pinus. 



6. AULACOSTETHUS OREGONUS, new species 



Figure 16, a 



Tarsal claws each with jour teeth; hind coxa ferruginous. 



Forewing about 10 mm. long; as seen from above, head about 0.85 

 as long as wide ; temple about as in Aulacostethus pacificus but a little 

 shorter and more strongly rounded (fig. 16, a); ovipositor sheath 

 about 1.75 as long as forewing. Otherwise structurally similar to 

 A. pacificus. 



Female: Ferruginous. Antenna except scape, maxillary palpus 

 except last three segments, labial palpus except last segment, some- 

 times an area on top of the head in front of the ocelli, front end and 

 inner edge of propleurum, mesosternum, metasternum laterally, areas 

 near base of forewing, and a narrow subapical transverse band on 



