32 Mr. J. W. Slioebotliam on some 



Octonema, Glaniopsis, Parahomaloptera, Crossostoma, Ilemi- 

 mijzon*, Gai^tromyzon {cf. Vaillant^ Notes Leydeii Mus. xxiv. 

 1902, p. 110), 



EXPLANATION OF PLATE 11. 

 Fig. 1. Hyopalatine and opercular bones of Leporimis frederici. 

 Fig. 2. Ditto of Prorhilodics lineatus. 

 Fig. 3. Ditto of Stemopygus macrunis. 

 Fig. 4. Ditto of Hemiodus kappleri. 



;>, frontal process of mesopterygoid ; ;?«/, palatine ; ;>^, pterygoid ; g-, quad- 

 rate ; WIS, mesopterygoid ; mt, metapterygoid ; hy, hyomandibular ; 

 sy, symplectic ; pop, prseoperculum ; op, operculum ; sop, suboper- 

 culum ; iop, interoperculum. 



III. — Some Records of CoUemhola new to England, with 

 Description of a new Species of Oiicopodura. By JOHN W. 

 Shoebotham, N.D.A. 



(From the Cooper Laboratory for Economic Research, Watford, Herts.) 



[Plate lU.] 



During the last two and a half years the author has made 

 collections of Collembola from several districts in England, 

 but chiefly from the counties of Hertfordshire, Buckingham- 

 shire, and Staffordshire. A list of the Hertfordshire 

 Collembola was published last year f, since when additional 

 forms have been found. Several species have been found 

 which prove to be new to the English fauna, including a 

 hitherto undescribed form. These records, with references to 

 the original descriptions of the species, are given in the 

 following paper. 



Order COLLEMBOLA, Lubb. 



Suborder Aethropleona, Born. 



Family Acliorutidse, Born. 



Subfamily Acsosutinm, Born. 



Genus Achorutes, Tempi., Lubb. 



1. Acliorutes serratus, Agr. 



Achortites serratus, Agren, (1904) pp. 5, 6, pi. i. figs. 6-7. 



Loc. StafEordshire. 



IdentiHcation confirmed by Dr. Agren. 



» Hemimyzon, gen. nov., type Homaloptera formosanum, Bouleng., 

 pelvic tins 15- or 16-rayed, with extended bases convergent posteriorly, 

 approximating to the Gastromyzon structure. 



t Collinge, W. E., and Shoebotham, J. W., "The Apterygota of 

 Hertfordshire," Journ. Econ. BioL. vol. v. pt. 3, pp. 95-132, figs. 1-15 

 (1910). 



