350 OBSERVATIONS ON 



Mymar atripennis. Curtis, E. B. 



Caput thorax et coxae posticee granulatse : abdomen Isevissimum 

 iiitidum : aculeus abdomine longior : alae pilosre lineola ambiente 

 crassiuscula : lunxila seu fascia ferniginea interne hylalino lim- 

 bata sita est transverse prope basin alarum anticarum fere sub 

 medio uhise, lineola tenuis subimpressa (s. nervus spurius) ibidem 

 orta usque in marginem exteriorem pone apicem alae excurrit, 

 leni fiexu a costa discedens. 



In autumn, among trees, but very rare. 



Add. — Of the other genera indicated in this family, Grantor 

 is Choreia, Westwood ; I had considered Encyrtus ineptus, 

 Dalman, as the type ; Choreia nigro-ccnea, Westw., seems 

 to approach the genuine Encijrti ; some of which have httle 

 more than rudiments of wings. The identity of Agonioneurus, 

 Westwood, with Ajiheliniis, has been ah-eady pointed out, 

 (antea page 306). 1 have deferred giving the characters of the 

 genus Cea, (Curt. G. 587,) with the hope of having the opinion 

 of a more competent judge than myself upon its affinities. 



Art. XXXIX. — Observations on Ignis Fatuus. By George 

 Wailes, Esq. 



I THINK the surmises of the writer in the Westminster Re- 

 view, that this natural phenomenon is to be attributed to some 

 luminous insect, are, so far as Britain and northern climes are 

 concerned, without foundation. That any large insect, pos- 

 sessing the property of luminousness, should have hitherto 

 escaped the pursuit of not only the Entomologists of this 

 island, but our numerous and indefatigable brethren on the 

 continent, is, to say the least, very improbable. Our only 

 British Anuulosa which have the power of hanging out their 

 lights are the glow-worm {Lampijris 7ioctiluca, Linn.), and 

 Scolopendra electrica, De Geer. Although Mr. Dilwynn, in 

 his valuable Memoranda relating to Coleopterous insects found 

 in the neighbourhood of Swansea, states, " Nor have I here 

 observed the small light in the males," of the glow-worm, 



