52 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



black, sparsely pilose. Wings hyaline or but faintly tinged, the vena- 

 tion pale, the marginal and stigmal nervures but slightly devel<)i)ed. 

 The antenuiB are rather long, the scape 2^ times the length of the i)edi- 

 cel; first flagellar Joint shorter than the pedicel, the joints beyond all 

 longer than thick. 



Habitat. — Western States. 



Types in National ]Museum and- Coll. Ashmead. 



Laelius nigripilosus, up. nov. 

 (PI. III. Fig. 7, 5.) 



S 9 . Length l.S to 2.5'"'". Black, shining, faintly alutaceous, the 

 head in the 9 much wider than in the S , similar to the head in Gonio- 

 zus. Mandibles in 9 black, in i rufous. Antenna? 13-jointed, pale 

 brown; flagellar joints 1 to 3 nearly equal, about twice as long as 

 thick, the following shorter; in the 9 the ttageilum is stouter and the 

 joints shorter than in the S . Mesonotum with 2 delicate furrows, in- 

 distinct or wanting in the male. ScuteUum with a distinct transverse 

 farrow at base. Metathorax subquadrate, the dorsum with a single 

 central carina and with a scaly punctuation. Wings grayish-hyaline, 

 the nervures yellowish or ])ale, the marginal and radius very short, 

 scarcely developed. Legs ferruginous or reddish -yellow. Abdomen 

 in 9 conic-ovate, about as long as the head and thorax united, subpe- 

 tiolate; in $ ovate, much shorter than the thorax. Both sexes are 

 covered with long, sparse black hairs, more apparent in the male, and 

 denser on the head and towards apex of abdomen. 



Habitat. — Jacksonville, Fla. 



Types in Coll. Ashmead. 



BETHYLUS Latreille. 



Hist. Nat., Ill, 315 (1802) ; Forster, Ilyui. Stud., ii, 96 (1856). 



(Type li. ctnopterm Pauz.) 



Head oblong, smooth; eyes broadly oval or rounded; ocelli 3, distinct, 

 prominent. 



Antennpe 12-jointed, filiform, moniliform, or setaceous; scape very 

 short; pedicel in 9 a little longer than the first flagellar joint, in $ shorter. 



Maxillary palpi 6-joiiited ; labial palpi 3-jointed. 



Mandibles short, curved, not very broad at tips, truncate, with 3 or 

 4 small teeth, the outer acute. 



Thorax subovate; the prothorax triangular, rounded in front; me- 

 sonotum most frequently without furrows; short, transverse; metatho- 

 rax usually with delicate longitudinal keels, the apex subtruncate. 



Front wings with a very small marginal vein, a short stigmal vein, and 

 two basal cells of an erjual length; no traces of other veins or cells. 



Abdomen ovate, pointed at tip, the third segment the longest, the 

 apical margins of the segments straight. 



Legs short, stout, the femora much swollen, the anterior pair the 



