274 ME. E. m'lachlan's eeyision of 



geneous ; yet P. gigas and its allies seem to form a genus apart, 

 and I have in this paper {ante, p. 243) proposed a generic term for 

 P. hcBmatog aster. Stenares forms a natural group. Pamexis is 

 also natural ; yet M. pardalinus of Walker might be placed 

 either here or in Palpares. Tomateres is to a certain extent made 

 up of nearly allied forms, but their relationship to Palpares is 

 close. Dimares is very natural. Stilbopteryx differs widely from 

 any other group. Acanthaclisis is made up of species with a 

 particular facies, yet contains well-marked groups, A. horridus 

 and A. fallax being especially aberrant. The words in Hagen's 

 diagnosis, " calcaribus fractis " only hold good for a portion of the 

 species ; in the rest the spurs are regularly curved. Glemirus is 

 especially heterogeneous, aud stands greatly in need of redivision : 

 the Australian species, and especially G. erythroceplialus, have 

 little in common with the others. Creagris is apparently natural. 

 Gymnocnemia comprises very few species, which readily fall into 

 one genus. Mecistopus should probably be only retained for the 

 typical species ; the South American M. efferus and JML. prmdator 

 are aberrant. Formicaleo is tolerably natural, but should perhaps 

 include some species placed in Glenurus. JKyrmeccelurus should 

 be retained for Ji". trigrammus and its near allies, which alone 

 possess the character " abdomen maris ante apicem penicillatum j " 

 the other species are aberrant. Macroneviurus seems to be natural. 

 Myrmeleon, if regarded as a group distinguished by the spurs not 

 exceeding the first tarsal joint, is tolerably homogeneous, yet it 

 contains discordant materials when viewed from other points. 



.The number of species of Myrmeleon, in the old sense, will 

 probably be eventually found to exceed 500 ; and it is evident that 

 in such a mass very many generic forms must exist. It remain^ 

 for a monographer to sift this mass ; until then I fear that a 

 natural classification of the Myrmeleonidce cannot be looked for, 

 and we must be content to improve upon the generic groundwork 

 laid down by Hagen. 



M. gigaS, p. 301, 1 =Palpares yigas, Dalm. 



M. coi>lTRARius, p. 301, 2 = Palpares contrarius, Walker. 



M. soLLiciTUS, p. 302, 3 = Palpares cephalotes, Khig, 2- This insect 

 was taken during the exploring voyage of the ' Blonde ; ' but no 

 locality is mentioned. Hagen (Stett. Ent. Zeit. 1860, pp. 360-361) 

 thinks it may be from the Society Islands. This I conceive to be im- 

 possible, and consider it African or Arabian. The specimen agrees 

 perfectly with King's figures (Symb. Phys.) of his cephalotes. 



