-Mr. \V. F. Ivirhy on Udonfita fr>nn II<tin<in. 



bM 



Agrionidae. 



AfJUlONIN.'B. 



Miiti'ona, De Selvs. 



9. hdiiitris, l)e Solys. 

 liayadeni, De Solvs. 



■ 10. sp. 

 PstudophfPii, Kirb. 



11. dccorata, De Selys. 

 Jifiiniicifpfia, liiimb. 



ll^. Whiteheadi, sp. ii. 



CfENAORIONIN'^. 



Ceriayrion, De Selys. 



13. cornmandelianum, Fiihr. 

 I'sfudiiUstes, g. n. 



14- mirabilis, 8p. u. 



Libellulidae. 



LltlKLI.ri.lNiB. 



Xeurotfionis, 1 {rimer. 



1. '/W//V/, Dru. 

 Tiitfioni*, Hniuor. 



'2. trin'd/ii, Rami). 

 Crocot/ifmiit, Mriiuer. 



3. servilid, Dm. 

 Zi/i/oni'dia, jr. ii. 



4. «'«.<///« i'j», .sp. n. 

 Orthctiurn, Xowm. 



o. testdcciiin, Dunn. 

 I)ij)/itci)d<'A, Kirb. 



G. nefml'isd, Fabr. 

 Acisoimi, liaiub. 



7. panorpoides, Riinib. 



(lOMPUIN.T.. 



yKuhua, Fiibr. 



8. Thumasnuni, .«j». n. 



1. Neurothemi's TuUia. 



L'beUula Tnllia, Drurv, 111. E.^ot. Ent. ii. pi. xlvi. fig. 9 (1773). 

 Ntuvothemis I'uUia, Kirb. Cat. Neur. Odon. p. 8. n. 6 (1890). 



Five specimens were obtained of this common East-Indian 

 species. 



2. Trithemis (?) trivialis. 



Lihellula trmalii, Raiub. Ins. N6vr. p. 116 (1842). 



Tnfhemis (rinalis, Kirb. Cat. Near. Odon. p. 18 (1800); De Sely.s, 



Ann. MiLo. Genov. xxx. p. 467 (1801). 

 J >iplacodea trivialis, Kai-sch, Ent. Naclir. xvii. p. 246 (1891). 



Three specimens obtained. 



Dr. Karsch has pointed out that tliis species is not a true 

 Tritliemis, from which it differs in having the sectors of tlie 

 triangle distinctly separated on the hind wings. He refers 

 it to iJi placodes^ the type of which is D. teti-a, Ramb. ; but 

 from Jh'pldcodes it differs in several important characters. 

 The triangle of the foie wings is traversed ; the subtriangular 

 space consists normally of 3 cells, and only exceptionally of 

 2, whereas in D. tetra the usual number is 2, and only 

 exceptionally 1 or 3 ; and the triangle is followed by one row 

 of 3 cells and then several of 2. The more extensive genera of 

 Libellulinje need a further revision ; typical T/-«'Me?»?V has the 

 triangle followed by 3 cells, increasing, and Diplncodes by 2; 

 and sjiccies with one row of 3 cells, followed by several of 2, 

 do not, strictly speaking, belong to either genus. But I do 

 not wish to subdivide existing genera in the present paper. 



34* 



