Zoological Society. 219 



turnal Lepidoptera are often almost impossible to describe, and it is 

 only by the most accurate figures, or by comparison of specimens, 

 that we can arrive at the determination of species. 



I am indebted to Mr. Alfred Lambert of Sydney for the speci- 

 mens figured and for the drawing of the larva. The following note 

 accompanies the specimen : — 



" The larva is figured in drawing No. 2. When I first found it I 

 concluded that it was a Cerura, as in its habits it resembles the larva 

 of that genus. It forms a strong cocoon, which is slightly attached 

 to the trunk of the tree just below the surface of the ground. In 

 form this cocoon is much like that of our common Saturnio, only 

 exteriorly it is covered with points of sticks, grass, &c. The larva feeds 

 on the Eucalypti, is found in January : the imago appears in July." 



From this it will be seen that it is a winter insect. 



3. Description of twenty-nine new species of Helicina, from 



THE COLLECTION OF H. CuMING, EsQ. By Dr. L. PfEIFFER. 



1. Helicina acuta, Pfr. Hel. testa depi-esso-conicd, soliduld, ob- 

 lique confertim striatd et subgranulatd, opacd, luted, superrie rubro- 

 unifasciatd ; spird conoided, acutd, mucronatd ; anfractibus fere 6 

 planiusculis, acute carinatis, ultimo basi planiusculo ; aperttird 

 perobliqud, subtriangulari ; columella subverticali, brevissimd, basi 

 angulatd, superrie in callum basalem tenuissimum abiente ; peristo- 

 mate simplice, aurantiaco, margine supero subrecto, basali subin- 

 crassato. 



Diam. 15, altit. 7^ mill. 



From Sibonga, isle of Zebu ; collected by Mr. Cuming. 



2. Helicina Adamsiana, Pfr. Hel. testa depressd, tenuiusculd, 

 sub lente seriebus confertis concentricis pustularum exiguarum 

 subasperatd, nitiduJd, diaphand, rubella; spird brevissime conoi- 

 ded; anfractibus b^ planiusculis, ultimo depresso, peripherid ro- 

 tundato, antice non scrobiculato ; aperturd obliqud, subtriangulari ; 

 columelld vertical'', brevissimd, basi subangulatd, superne in callum 

 tenuem, circumscriptum dilatatd ; peristomate angulatim expanse, 

 rejiexiusculo , margine supero breviter soluto, stricto, basali prope 

 columellam subdentato. 



Diam. 8, altit. 4^ mill. 

 From Jamaica. 



3. Helicina amcena, Pfr. Hel. testd subsemiglobosd, solidiusculd, 

 oblique striatuld lineisque impressis concentricis distantibus sculptd, 

 nitiduld, roseo et luteo vel albo variegatd ; spird convexd, mucro- 

 nulatd ; anfractibus 5^ vix convexiusculis, ultimo infra medium 

 carinato, basi subplano ; aperturd obliqud, subtriangulari, intus 

 fiavd ; columelld brevi, verticaliter subrimatd, basi angulosd, re- 

 trorsum in callum tenuem, diffusum abiente ; peristomate simplice, 

 margine supero late expanso, basali reflexo* 



Diam. 15, altit. 9^ mill. 

 From Honduras. 



4. Helicina Besckei, Pfr. Hel. testd subsemiglobosd, solidd, sub- 

 tilissimc striatuld, sublcevigatd, opacd, citrind unicolore vel fascia 



