Mexican and Central American Chauliognathinae. 129 



from Ecuador, the male of which is miknowu), and 

 Daiphron, Gorham (type />. lycifonne), and so far as at 

 present known is mainly confined to the New World, a 

 few species from New Guinea, Austraha, and Lord Howe 

 Island excepted. 



The Lyciform Tropical American insects placed by 

 Gorham under Daiphron mimic some of the Lycids of the 

 same regions ; but in one of them the mimicry is confined 

 to certain varieties of the female only. Then again, 

 amongst the Chauliognathi, with which D. proteum 

 must be placed, there are forms mimicking, in one {C. 

 corvinus) or both (C. morio) sexes, various Lampyrids of 

 the genera Photinus. These divergences from the Chau- 

 hognathid type (which are even better illustrated, as 

 regards the Lampyriform facies, in Discodon, of the sub- 

 family Telephorinae), in one or both sexes, are of particular 

 interest, considering the abundance of the feeble sluggish 

 Lycids and Lampyrids in the same country ; the predatory 

 Chauliognathinae, however, to judge from the special glands 

 along the margins of their abdomen, may be equally dis- 

 tasteful to certain enemies. C. procerus, Bourg., from 

 New Guinea, and the Austrahan species, including Tele- 

 phorus pulchellus, MacLeay, referred to Chauliognathus by 

 Bourgeois,* as well as the aUied T. apterus, Olhli, from 

 Lord Howe Island, differ from the American forms in 

 having the median lobe of the aedeagus much less twisted 

 and the asymmetric lateral lobes pecuharly shaped, the 

 left lobe (as seen directed forwards) being greatly developed 

 in C. procerus, etc. The general structure of the aedeagus, 

 therefore, indicates that the Austrahan and New Guinea 

 insects (seven species of which have been dissected) 

 should be treated as generically distinct from Chaulio- 

 gnathus. The circular pit at the outer apical angle of each 

 dorsal abdominal segment (not to be confused with the 

 transverse spiracles, which are placed near the inner edge 

 of the refiexed portion of the same segment, or on the 

 membranous space connecting the two surfaces) is the 

 outlet of a secretory gland, from which a hquid or ofiensive 

 odour is doubtless emitted by the insect in hfe. In certain 

 American genera of Telephorinae with greatly abbreviated 



* Bull. Soc. Ent. Fr. 1910, p. 126. Females only were known of 

 the two New Guinea insects described by him. Additional species 

 from that Island have since been described by Pic {op. cit., 1911, 

 pp. 197-199). 



TRANS. ENT. SOC. LOND. 1914. — PART I. (jUNE) K 



