524. 

 GORYTES BICINCTUS. 



Order Hymenoptera. Fam. Crabronidse. 



Type of the Genus, Sphex mystacea Linn. 

 GoRYTES Lat., Spin., Van Lin., St. Farg., Curt. — Mellinus Fab., 

 Panz. — Arjiactus Jur., Panz. — Sphex & Vespa Linn. 

 Antenna inserted at the middle of the face, approximating, long, 

 filiform, nearly straight and 13 -jointed in the male (1 (J), the 

 basal joint subovate-truncate, 2nd cup-shaped, remainder long, 

 of equal length, each joint slightly curved, the apical joint a 

 little conical at the apex : not longer than the head and thorax 

 in the female, curved, clavate and 12-jointed (1 g), basal joint 

 rather the stoutest, subovate, 2nd small cup-shaped, 3rd and 4th 

 long and slender, the remainder decreasing in length and in- 

 creasingin diameter, apical joint elongate-ovate and alittle curved. 

 Labrum transverse, very short, a little curved and ciliated with 

 bristles, some very long (2). 



Mandibles crossed in repose, long, narrow, a little curved, with 

 a few hairs outside, terminated by a strong tooth with a smaller 

 one beneath it (3). 



MaxillcB with the basal portion large and nearly semiorbicular, 

 terminated by two rounded hairy lobes. Palpi long, jiubescent, 

 and 6-jointed, basal joint the shortest, 4th and 6th the longest, 

 2nd and 3rd the stoutest, somewhat obovate, especially the 

 latter, 4th and 5th clavate, 6th slender, conical at the apex (4). 

 Mentum subquadrate, the basal angles dilated, with a rounded 

 lobe in front which conceals the Lip. Palpi not short, very 

 pubescent and 4 -jointed, basal joint a little the longest and 

 clavate, the remainder nearly of equal length and obovate, ter- 

 minal joint the slenderest and somewhat elliptical (5). 

 Males smaller than the females. Head transverse, face orbicular: eyes 

 elongate-ovate, narrowed above : ocelli 3 in triangle. Thorax globose : 

 scutellum transverse-ovate. Abdomen ovate conical. "Wings with 

 one marginal and 4 sub-marginal cells, the 2nd receiving 2 recurrent 

 nervures. Legs rather short and stout in the female: thighs short: 

 tibiae clavate, anterior with one, the others with 2 spines at the apex: 

 tarsi 5-jointed, posterior the longest, anterior sometimes a little di- 

 lated and ciliated in the females, basal Joint the longest, 4th the 

 shortest : claws and pulvilli large in the female. 



BiciNCTUs Rossi. — Curt. Guide, Gen. 690. n. 8. 



Black; 2 basal joints of antennae yellow and the others ochreous 

 beneath ; trophi and lower part of face yellow, apex of mandibles 

 brown: collar, a dot on each side, and 2 spots on the scutellum, 

 yellow ; a triangular space on the postscutellum finely striated ; 

 basal joint of abdomen pear-shaped, with a yellow fascia divided 

 in the middle, 2nd segment with a broad, 3rd with a narrow 

 5'-ellow band, the former not touching the posterior margin : 

 wings slightlyfuscous, the marginal, central submarginal, and the 

 discoidal ceU below them, clouded with brown : legs ochreous, 

 4 anterior coxae, and 1st pair of trochanters with yellow spots 

 beneath ; thighs yellow beneath ; tibiae with a black streak out- 

 side; tarsi ferruginous, brown towards the apex; posterior legs 

 black, tibiae with a streak of yellow outside at the base. 



