44 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



Described from two female specimen labeled "Gulfport, Fla., 6-II." 

 The paratype differs from the type only in having 30-segmented 

 antennae and in having the mesopectus red. 



17. BASSUS PERFORATOR (Provancher) 



Agathis perforator Provancher, Natural. Canad., vol. 12, 1880, p. 177, no. 3. 

 Agathis femorator Provancher, Natural. Canad., vol. 12, 1880, p. 177, no. 4. 

 Bracon (Agathis) sassacus Viereck, Bull. 22, Conn. Geol. and Nat. Hist. Survey, 



1917 (1916), pp. 230 and 231. 

 Bracon (Agathis) branfordensis Viereck, Bull. 22, Conn. Geol. and Nat. Hist. 



Survey, 1917 (1916), pp. 230 and 231. 



Type. — The types of perforator and femorator are in the Museum 

 of Public Instruction at Quebec, Canada; those of sassacus and bran- 

 fordensis are in the collection of the agriculture experiment station 

 at Nev/ Haven, Connecticut. 



The types of sassacus and branfordensis wliich I have studied, are 

 conspecific in my opinion; they were originally seperated on the basis 

 of slight color differences, which are of no consequence. Unfor- 

 tunately I have not seen the types oi femorator and perforator; but 

 from the original descriptions and notes on the types by S, A. Rohwer, 

 and also from specimens compared with the types and determined 

 as these species by Mr. Rohwer, it appears that they are not speci- 

 fically distinct, and that they are in all probability the same as sassacus 

 and branfordensis. Since perforator has line precedence over femo- 

 rator, it is the valid name. 



The material examined indicates that the species is most closely 

 related to nigripes, but the basal abominal tergites are nearly always 

 more or less sculptured; the propodeum is usually more completely 

 aerolated; the parapsidal grooves are faintly indicated; and the tho- 

 rax is generally darker, especially on the mesonotum; in size nigripes 

 averages a little larger. The face is more or less lengthened being 

 subrostriform, with the malar space rather long; antennae in the 

 the material studied varying from 25 to 29 segmented, slender, not 

 tapering to the apex; frons smooth, immargined; mesonotal lobes 

 very faintly defined, the parapsidal grooves almost wanting; propo- 

 deum usually very faintly punctate and nearly completely aerolated 

 with a long narrow median area and with the basal lateral and api- 

 cal lateral areas nearly always distinct; mesopleural furrow smooth; 

 second cubital cell triangular, with a short petiole; first abcissa of 

 mediella about as long as the second; first abdominal tergite with 

 two prominent dorsal longitudinal keels and more or less finely punc- 

 tured or striato-punctate; second and third tergites often finely 

 closely sculptured; ovipositor sheaths nearly as long as the body. 

 Head black, often more or less varied with ferruginous; thorax varying 

 from entirely black to almost entirely ferruginous ; usually the thorax 

 is black with the mesopleura and the metapleura mostly pale, but 



