?>2 Mr. J, W. Slioebotliam on some 



Octonemn, Glaniopsis, Parahomaloptera, Crossostoma, Ilemi- 

 mifzon*, Gastromyzon [cf. Vaillant, Notes Lejclen Mu.«. xxiv. 

 1902, p. 110). 



EXPLANATION OF PLATE II. 



Fig. L Ilyopalatine and opercular bones of Leporinus frederici. 

 Fir/. 2. Ditto of Profhilodns lineaf.us. 

 Fig. 3. Ditto of Stemopi/gus macrurus. 

 Fig. 4. Ditto of Heiniodiis kappleri. 



p, frontal process of mesopterygoid ; ;?«/, palatine ; /)<, pterygoid ; g, quad- 

 rate ; WW, mesopterygoid ; mt, metapter^'goid ; hi/, hyomandibular ; 

 sg, symplectic ; pop, prffioperculuni ; op, operculum ; sop, suboper- 

 culum ; iop, interoperculum. 



Ill, — Some Records of Collemhola new to England, with 

 Description of a neio Species of Onco\)0<\\na. Jiy JoHN W. 

 Shoebotham, N.D.A. 



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



[Plate III.] 



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

 colleclioiis of Collembohx from several districts in England, 

 but chiefly from the counties of Hertfordshire, Buckiniiham- 

 shire, and {Staffordshire. A list of the Hertfordshire 

 C/ollembola 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 tlie 

 i'oliowing pai)er. 



Order COLLEMBOLA, Lubb. 



• S uborder A R T H R P L E N A, Born. 



Family Achorutidse, Born. 



Subfamily AcnojiUTiNJE, Born. 



Genus Aciiorutes, Tempi, Lubb. 



1. Jchorutes serratuSy Agr. 



Achorntcs serratus, Agren, (1904) pp. 5, C, pi. i. figs. 5-7. 



Lac. Staffordshire. 



Identiiication contirnied by Dr. /v^-ren. 



* Ilemimgzon, gen. nov., typo Ilojnaloptcra formosanimi, Bouleng., 

 pelvic lins lo- or lU-rayed, with extended bases convergent posteriorly, 

 approximating to the O'asfroingzon structure. 



+ CoUingo, W. K., and Shoebotham, J, \V., "The Apterygota of 

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

 (lUlO). 



