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III, Revision of the Mexican and Central American 

 Chauliognathinae {Fam. Telephoridae), based on 

 the genital armature of the males. By George 

 Charles Champion, F.Z.S, 



[Read March 4th, 1914.] 



Plates III— VIII. 



Since the conclusion of the Rev. H. S. Gorham's work on 

 the Mexican and Central American Chauliognathinae, in 

 1885, a great deal of additional material has accumulated, 

 necessitating a complete revision of the numerous forms 

 described by him. For this purpose the aedeagus of the 

 male of each species has been examined, and figured, good 

 differential characters having been found to be present 

 in the genital armature. As might be expected, far too 

 much importance has been attached to colour by nearly all 

 writers on the subject, and the real structural characters, 

 in consequence, overlooked. About a dozen so-called 

 species are here sunk as synonyms or varieties, but the 

 deficiency is nearly made up by the forms now added, 

 bringing the number to 40, one {Chauliognathus morio, 

 Gorh.) having to be erased as not belonging to the region. 

 No attempt, it may be observed, seems to have been 

 made since Leconte's time to revise the N. -American 

 Chauliognathini, two more of which (C marginatus, F., 

 and C. discus, Lee.) are here added to the Mexican 

 Hst. The group, or subfamily, may be characterised 

 thus : — mentum elongate ; gular sutures confluent ; tarsal 

 claws simple; dorsal segments 1-7 of the abdomen each 

 with a circular pit at the outer apical angle of the reflexed 

 lateral margin, 8 simple; aedeagus of (^ with a very stout 

 twisted median lobe, and asymmetric rigid lateral lobes 

 (one of which is sometimes wanting), covered by an oval 

 convex cap, which (as seen from the ventral aspect) is 

 more or less emarginate on the left side, the last ventral 

 segment broadly cleft down the middle for its reception. 

 The subfamily Chauliognathinae as thus defined includes 

 Chauliognathus, Hentz (type Telephorus pennsylvanicus, 

 De Geer), Xenismus, Waterhouse (type X. nigroplagiatus, 



TRANS. ENT SOC. LOND. 1914. — PART I. (JUNE) 



