652. 

 TRYPOXYLON CLAVICERUM. 



Order Hymenoptera. Fam. Crabronidae. 



Type of the Genus, Sphex Figulus Linn. 



Trypoxylon Z/af., Fab., St. Farg., Shuc, Curt. — Apius Jur. — Sphex 

 Linn. 



Antennce inserted under a little tubercle at the base of the cly- 

 peus, approximating, short, not geniculated, but curved, a little 

 clavate, 13-jointed in the male (1 (J), basal joint short stout and 

 somewhat obovate, '2nd globose, 3rd slender oblong, the follow- 

 ing gradually decreasing in length and increasing in diameter, 

 becoming transverse towards the apex, the last joint long, 

 curved and conical, 12-jointed in the female, scarcely clavate, 

 the apical joint not curved. 



Labrum concealed, the base elongate-trigonate, anterior portion 

 forming two long broad parallel lobes, obtuse and ciliated with 

 long hairs (2) . 



Mandibles long slender lanceolate and curved, broadest at the 

 base, with a large angle on the inside, externally hairy (3 $ ) ; 

 smaller and claw-shaped in the male, and regularly curved, not 

 angulated internally ( c?)- 



MaxillcB with a small lobe inside, terminated by a larger ovate 

 one, ciliated outside. Palpi long, ciliated internally, filiform, 

 composed of 6 joints of nearly equal length, basal joint a little 

 the shortest, the following cleaver-shaped, 5 th sometimes the 

 longest, 6th very slender (4). 



Mentum short broad and suborbicular, base truncated, the sides 

 trisinuated, anterior margin straight. Lip very short and nearly 

 concealed. Palpi neither long nor stout, pubescent, 4-jointed, 

 2 basal joints the longest, clavate, 3rd nearly ovate, 4th ovate 

 (5). 

 Head transverse, face orbicular (1 $ ).- eyes large vertical and deeply 

 notched on the inside : ocelli 3 in triangle on the crown. Thorax 

 globose : scutel subquadrate, the basal angles produced. Abdomen 

 very long, slender at the base, gradually becoming clavate, the apex 

 incurved and acute. Wings, superior with one marginal and 3 sub- 

 marginal cells, the nervures of the 2nd and 3rd as well as of the ex- 

 ternal discoidal cell but faintly traced (9). Thighs short and stout : 

 tibiae, anterior very short, with a spine at the apex, the others spurred: 

 tarsi 5-jointed, hinder long, terminal joint short atid stout: claws and 

 pulvilli thick. 



Clavicerum St. Farg. — Curt. Guide, Gen. 682. 3. 2nd Edition. 

 In Mr. Shuckard's Cabinet. 



Trypoxylon is considered to be allied on the one hand to 

 TacJiT/buhis, and on the other to Nztela, both of them Euro- 

 pean types, but not inhabitants of this country. 



