Dr. M. Burr — Notes on the Forficularia. 39 



Kongl. Vet.-Akad. Forhandl. Arg. 33, no. 5, pp. 23-42, pis. viii.- 

 xi. 

 Wahlgben, E. (1900.) ' Apterygoten aus Agypten und deiu Sudan 

 iiebst Bemerkungen zur Verbreituug und Systematik der Collem- 

 bolen.' Results of the Swedish Zoological Expedition to Egypt 

 and the White Nile, 1901. under the direction of L. A.Jiigers- 

 kiold, no. 15, pp. 1-72, tigs. 1-52. 



EXPLANATION OF PLATE III. 



All the illustraiions are of Oncopodura crassicornis, sp. n. 



Fig. 1. Outline, from the side. 



Fig. 2. Ivight antenna from above, showing also postantenual organ from 



the side. 

 Fig. 3. Three terminal joints of the antenna, showing sense-organs. 

 Fig. 4. Left postantenual organ and base of antenna. 

 Fig. 5. Mesothorax from the side, showing fine sensory hair. 

 Fig. 6. Manubrium and dentes from the side. (Nearly all the feathery 



hairs had been denuded from the dentes.) 

 Fig. 7. Mucro, with lamellae, from the side. 

 Fig. 8. Tibio-titrsus and foot of second leg, showing clavate hair. 

 Fig. 9. Outline of scale. 



IV. — Notes on the Forficularia. — XVIII. More now Species. 

 By Malcolm Buer, D.Sc, F.E.S., F.Z.S., F.G.S. 



Diplatys riggenhachij sp. ii. 



S. Vertex lumidus; occiput depressum, carinulis acutis ; pro- 

 notum cT 2 breve, pentagonale, postice subangustatum ; elytra 

 alseque perfecta ; segmentum ultimum dorsale S intiatum ; 

 segmentum penultimum veutralo J basi latum, apicem versus 

 angustatum, apice truucatum ; forcipis bracchia cJ basi dilatata 

 ac deplanata, turn atteiiuata, fortiter arcuata. 



6. 2. 



Long, corporis 13 mm. 10'5-12'5 mm. 



„ forcipis 2 „ 2 „ 



Size relatively large ; general colour rust-red. 



Antennse fulvous, with about 22 segments, tiiird not very 

 long, fourth and fifth quite short, rest slowly lengthening ; 

 cylindrical. 



Head broad and depressed ; sutures distinct ; in the (^ 

 vertex tumid, occiput depressed, postocular keels sharp ; in 

 the $ vertex and occiput similar, postocular keels shorter; 

 eyes prominent. 



