18 BRITISH ICHNEUMONS [Xylonomtis. 



Table of Spea'es. 



(81. I. Basal segment much lunofer than apically broad. 



(3). 2. All the tibiae basally, and scutellum 



apically, white .. i. v\<EC.\'lOV.\v<^, Fab 



(2). 3. Tibiae and scutellum not white- 

 marked. 



(5). 4. Radial nervure elongately coalesced 



with e.xternal cubital .2. RLSl'ld'S, Dcsv. 



(4). 5. Radial nervure but normally coal- 

 esced with cubital. 



(7). 6. Scutellum not laterally reflexed ; 



tibiae not tortuous -J- IRRIGATOR, Fah. 



(6). 7. Scutellum laterally reflexed at apex ; 



tibiae tortuous • 4- I'li-ICORXI.'^, Grav. 



(i). 8. Basal segment not or hardly longer 



than apically broad . . • 3- sectricorxis. Holm. 



1. precatorius, Fah. 



Ichneumon praecatorius. Fab. E. S. ii. 139, ? . Cryptus praecatorius, Fab. 

 Piez. 72. Xorides praecatorius. Lam. His. nat. iv. 135*, ? . Xylonotnus pre- 

 catorius, Gr. I. E. iii. 841, ? ; Ratz. Ichn. d. Forst. 123; cf. iii. 115; Holragr. 

 Sv. Ak. Handl. 1860. n. 10, p. 70; Tasch. Zeits. Ges. Nat. 1863, p. 300; Brisch. 

 Schr. Nat. Ges. Danz. 1880, p. 128; Thorns. O E. viii. 775 cf 9 . X. parvulus. 

 Gr. I. E. iii. 825, <? . 



A black and white species, subrugoselv punctate and hardlv shining. 

 Head black with the palpi pale ; labruni and the internal orbits white ; 

 9 with a facial mark, an abbreviated longitudinal line between the 

 antennae and generally part of the external orbits white, often also with 

 a lateral occipital mark red or castaneous. Antennae of ^ slender, 

 filiform, setiferous and shorter than the body ; of 9 with the scape 

 beneath and a central flagellar band on joints 10 to 15 white. Thorax 

 black, of (J cylindrical ; of 9 with two prothoracic dots and the 

 propleurae, callosity beneath the radix, a lateral or pectoral dot, apex of 

 the mesopleurae linearly and a dot above the hind coxae, ustially more 

 or less white ; pleurae sometimes badious ; metathorax with apophyses 

 obsolete and five notal areae comj)lete and distinct. Scutellum with two 

 apical white dots. Abdomen of ^ immaculate, parallel-sided, a little 

 narrower and longer than the thorax ; of 9 with the basal segment 

 bicarinate throughout, distinctlv coarctate behind the spiracles and some- 

 times apically white-margined ; the following laterally and usually also 

 apically w'hite-margined, the last red below ; second and third segments 

 transverse and scabriculous, in (^ with a smooth impression on either side 

 before the base ; terebra rather longer than half the abdomen, black with 

 the spicula red. Legs red ; anterior coxae and trochanters of 9 paler or 

 flavous-marked, of j partly black ; trochanters usually at least apically 

 nigrescent ; hind coxae and trochanters of ^ , and their femora in both sexes 

 apically, black ; tibiae basally white, centrally and the hind ones a])ically 

 infuscate, the anterior in 9 internally obliquely impressed and tortuous 

 towards the base. Wings h3'aline with the stigma infuscate and, in 9 > 

 basally white ; radix, tegulae and base of costa stramineous ; tegulae of 

 (J black, of 9 white-dotted. Length, 7-1 1 mm. 



♦ " Histoire naturelle des animaux sans vertfebres," &c. Par M. le Chevalier de Lamarck. Paris, 

 1817. 8vo. 



