228 Mr. J. O. Westwood's Description of some 



and not of Sphcx lohala. It is true, however, that Latreille has 

 added a cliaracter whicli does not agree with the female of S. com- 

 pressa although it accords with that sex of S. lohala, namely, the 

 mandibles furnished with a " dent remarqiuible." This character 

 is however found in the male of S. compressa, although not in the 

 female, at least the mandibles of the male of that species liave a 

 ".trong acute tooth on the inside, of which the females are destitute, 

 whilst the females of S. lobtita have a truncated tooth in the same 

 situation ; so that it seems to me not improbable that T;atreille 

 had taken this character from <S'. lohata and had added it to the 

 rest taken from S. compressa. We find the character of unidentate 

 mandibles given in the thirteenth volume of the " Histoire," &c. ; . 

 and in the "Genera Crustaceorum," &c. vol. iv. p. .06, Chlorion is 

 formed with Prono'iis into a section of the Sp/iegimce, having the 

 mandibles internally furnished with a strong tooth or process ; 

 the two species above mentioned being still given as the types of 

 Chlor/o7i. In all his subsequent works the genus is treated in a 

 similar manner, except that in the second edition of the " Regne 

 Animal" Sphcx compressa is given as the first, and S. lohata as the 

 second, species, and the genus is characterized from the position 

 of the recurrent veins of the wings of S. compressa (those of S. 

 lohata differing in this respect). 



We are thus warranted in considering the Sphex compressa. as 

 the true type of the genus Chlorion, although Latreille at the first 

 gave only the S. lohata as its type. It unfortunately happened, 

 however, that during the interval which elapsed between the pub- 

 lication of the third and thirteenth volimnes of the " Histoire 

 generale," Fabricius published his "SystemaPiezatorinn," wherein, 

 referring to Latreille's third volume, he adopted the name Chlorion, 

 giving, as Latreille had done, the Sphex lohata as its type, with 

 the oral characters of the genus derived from that species ; but 

 also inserting in the genus the Sphex compressa, and another 

 species congenerous with that insect (/S'. sihirica), as well as various 

 species of Sphex and Pronceus. Shortly afterwards Jurine pub- 

 lished his System of the Hymenoptcra founded on the variation of 

 the veining of the wings, and accordingly, following Fabricius in 

 considering the Sphcx lohata as the type of Chlorion, he sunk the 

 genus into Sphcx, with which that species agrees in the veining of 

 the wings ; biU finding that the Sphex compressa possesses a dif- 

 ferent character in this respect, he formed for its reception a new 

 genus named Anipulex, adding a second species, /I. fascia ta, from 

 the south of Europe, of which (as possessing more interest) he 



