764. 

 ALLANTUS FLAVIPES. 



Order Hymenoptera. Fam. Tenthredinidae. 



Type of the Genus, Tenthredo Scrophularise Linn. 



Allanttjs /«?•., Panz., Curt. — Tenthredo Z/««m., Fab., King., St. Farg. 

 Antenna frequently shortest in the males, inserted in the middle 

 of the face, approximating, as long as the thorax, clavate, com- 

 pressed, 9-jointed (1); basal joint short stout subpyriform, 2nd 

 small, obovate, 3rd the longest, clavate, 4th and 5th stouter 

 but much shorter, the following diminishing to the apical joint, 

 which is small and conical. 



Lahrum suborbicular, angulated in the centre and ciliated (2). 

 Mandibles very similar, curved, the apex forming a strong claw 

 with 3 or 4 stout teeth below, externally pilose (3) . 

 Maxillae long and slender terminated by an ovate lube, and an 

 internal pubescent one. Palpi long slender pubescent and G- 

 jointed, basal joint short, 2nd and 3rd longish and stout, 4th a 

 little longer, rather slender and clavate, 5th not longer than the 

 3rd, 6th shorter, the slenderest, apex conical (4). 

 Mentum short, corset-shaped. Palpi attached to the anterior 

 angles, short stout pubescent and 4-jointed, basal joint sub-py- 

 riform, the remainder nearly of equal length, terminal joint 

 ovate-conic. Lip broad and trilobed, central lobe oblong, late- 

 ral lobes more obovate (5). 

 Males not always the smallest. Head transverse-oblong , base concave : 

 face trigonate : eyes vertical, prominent, and oval : ocelli forming 

 a compact triangle on the crown. Thorax globose : scutel broad 

 and semiovate. Abdomen generally cylindric, a little depressed and 

 linear in the males, the apex rounded, sometimes rather broad in the 

 females, the apex conical : ovipositor not projecting. Wings, su- 

 perior with 2 marginal and 4 submarginal cells. Legs, hinder 

 long, stoutest in the males : thighs, anterior the shortest : tibiae all 

 spurred, anterior with the apex of one spur furcate : tarsi 5-jointed, 

 first 4 joints lobed beneath, and stouter than the others in the hinder 

 pair of the males (8 f) : claws bifid : pulvilli distinct. 

 Larvae with 6 pectoral, 14 abdominal and 2 anal feet. 



Flavipes Fourc. — Curt. Guide, Gen. 466. 



Male black, head and thorax mealy ; clypeus labrum and 2 

 basal joints of antennae yellow, 2nd black inside ; sides of collar 

 scapulars and 2 dots on postscutel yellow ; margin of 3rd seg- 

 ment and 2 following ferruginous, with a black streak at the 

 base of each, remainder yellow, base of 6th with a broad black 

 band, narrow on the 7th, wings ferruginous-yellow, costa and 

 stigma ochreous ; legs yellow, intermediate thighs with a small, 

 hinder with a large black patch on the inside ; 4 anterior tibiae 

 with a black patch at the apex ; tarsi black, gray at the base, 

 hinder with the 3 basal joints yellow. Female with 2 basal 

 joints of antennae yellow : abdomen with the margins of the 

 segments yellow, interrupted on the 2nd, 3rd and 4th, forming 

 sublunate spots on the sides (A) : wings yellow, costa stigma 

 and nerves orange ; hinder thighs with a black patch at the base. 

 In the Cabinets of Mr. Shuckard and the Author. 



If we take the typical species of Allantus and compare them 

 with those of Tenthredo, pi. 692, the differences are very 



276. 



