274 Mr. J. O. Westwood on Evania and 



Sp. 4. Trigonalys Leprieiirii, (Seminota Lepr. Guer. Mag. Zool. 

 1840, pi. 41.) 

 Habitat Cayenne, 



Sp. 5. Trigonalys Hahnii, Spinola. 



Omnino nigra, alis anticis fascid obscura. 

 Magnitudo praccedentis, sed gracilior et pedibus longioribus. 

 Habitat in Germania, Gallia et Anglia. 

 In Mus. Dom. Serville, Guerin, Spinola, Shuckard. 

 Syn. Trigonalys Hahnn, Spinola, in Guer. Mag. Zool. Ins. 

 1840, pi. 50. 



Trigonalys nigra, Westw., in hoc op. olira. 



Trigonalys Anglicana, Sluickard, in Entomologist, p. 122. 



Ahastus Macquartii, Lepell. de St, Farg. ined. 



Sj). 6. Trigonalys pullata.* 

 Syn. Lycogaster piullatus, Shuckard, in Entomologist, p. 124. 



Stephanus, Jurine. 



This is another anomalous genus whose true situation has 

 equally perplexed systematists : Jurine, the founder of it, placing 

 it with the Evaniidce on account of its relation with Foeniis, " soit 

 par la manifere de tenir son abdomen presque verticalement, soit 

 par le reuflement de ses jambes posterieures." Latreille, on the 

 other hand, placed it with Xorides, at the head of the genuine 

 Ichneumons, regarding it and Aulacus as the connecting links be- 

 tween them and the Evaniidce, observing " Stephani antennis et 

 abdominis insertione cum Ichneumonidibus omnino conveniunt, et 

 ad tertium ordinem methodi Jurineanae potius quam ad secundum 

 [scil. Evaniidce] cui inscribuntur, pertinent," — (Gen. Crust. 4, p. 4,) 

 It is chiefly on account of the number of joints in the palpi de- 

 scribed by Latreille, and all subsequent authors who have treated 

 upon the genus, (namely, five in the maxillary, and four in the 

 labial,) that this relationship with the genuine Ichneumons has been 

 founded ; but in Stephanus Brasiliensis, which I have very care- 

 fully examined, the maxillary palpi are unquestionably 6-jointed ; 

 which characters, as well as the recurrent vein, at once removes 

 the genus from the genuine Ichneumons : indeed, Esenbeck, 

 and Messrs. Serville and St. Fargeau, influenced by other con- 



* I consider Lycogaster puUatus, Shuckard, to be the male of another species 

 of Trigonalys. 



