262 Mr. J. O. Weslwood on Evania and 



obsolete In Alysia, the veins of the wings of the two genera are 

 nearly identical. The number of joints of the antennce, and the 

 mode of insertion of the abdomen, thus become almost the only 

 material characters to separate this genus from some of the Ich- 

 neumones adsciti ; indeed, Nees von Esenbeck introduces it into his 

 family Ichneumonides, with the observation " locum inter S'lgal- 

 phum et Fcenum jure meritoque tenet, utrique affinisj"* but in 

 S'lgalphus the mandibles have the characters of those of the 

 genuine Ichneumons. The relationship of Aulacus to Fcenus, on 

 the other hand, is far more sti'ong, especially in the two family 

 characters mentioned above, namely, the number of joints of the 

 antennae and the insertion of the abdomen, as well as in the ex- 

 serted ovipositor and number of joints of the palpi. No figure 

 of the male of this genus having been hitherto figured, I have 

 added a representation of that sex of A. Erichsonii. 



The following is a description of all the species of the genus 

 with which I am acquainted : — 



Sp. 1 . Aulacus striatus, Jurine. 



Niger, pedibus totis abdomineque rufis, coxis posticis petioloque 

 nigris, capite Isevi, antennis nigris, thoracis dorso transversim 

 sulcato, alis hyalinis immaculatis, nervis et stigmate fuscis 5 . 



Long. corp. lin. 3£ (in fig. Jurin.). 



Habitat in Helvetiae Montosis, Jur., etiam in Lappohia, prope 

 Caput Boreale, Esenbeck. 



Syn. Aidacus striatus, Jur. Hym. p. 90, pi. 7, G. 3 ; Esen- 

 beck, Insecta Lapponica, p. 407 ; ncc Latr. Gen. Cr. et Ins. iv. 

 p. 330. 



In Mus. Berol. vidi, 



Variat, secundum D. Servilleum, ore margineque antico et 

 postico oculorum testaceis. 



Sp. 2, Aulacus gloriator. 

 Ater, abdomine medio pedibusque rufis, coxis trochanteribusque 



nigris, tibiis 2 posticis fuscis, tarsis flavidis, alis macula stig- 



maticali apiceque fuscis. 

 Long. Corp. lin. 5^. 

 Habitat prope Viennam, N. ab Esenb. Gartz. Pomerania, Mus. 



Berol. 

 In Mus. Univers. Bonnse et Reg. Berol. 



* lusccla Lapponica, p. 408. 



