Vol. Xxiv] ENTOMOLOGICAL NEWS. 153 



or spiculation is finer and less extensive in argiadcs, the hooks have no 

 sharp curve and are fine, the lower soft spatulate extremity is longer 

 and narrower than in the European insect, and is also very finely and 

 closely spiculed with an abundant supply of very fine shortish hairs ; 

 the clasp itself is long and broad, being of a fairly even oblong shape ; 

 the fulcrum (or penis guide) is proportionately longer so as to reach up 

 to the top edge of the clasp. The tegumen has the central projection 

 hollowed so as to form a sharpish tooth and is shouldered (not well 

 shown in figure), not sloping evenly off as does argiades, whilst the 

 falces (the short spikes, generally hooks, just below the tegumen) are 

 quite fine, in marked contrast to those of argiadcs. The aedoeagus is 

 also of the coretas shape, viz., tapering from a broad base not nearly 

 even in width, as in figure i. 



Comparing this with the Utah figure it will be noticed how still finer 

 are the extremities of the clasps, going yet further away from argiades, 

 but when it is compared with the Vancouver figure a difference will 

 be seen. The hook-like extremities are shortened in the latter ; they 

 are of the same shape and curve as amyiitula and our European coretas, 

 but not so long ; in this there is a slight approach to argiades. This 

 also applies to the specimen figured from Calgary, but not to the same 

 extent. The small specimens from Aweme, Manitoba, have append- 

 ages that are essentially of the coretas type in all particulars. We 

 therefore have in North America an interesting position in the evolu- 

 tion of species. Argiades does not remain, but it has apparently left 

 some trace behind in the Vancouver race with its shorter hook-like 

 extremities in the clasps, though in no other particular ; the Manitoba 

 specimens are coretas so far as their genitalia are concerned, though 

 they could at once be separated by their color and pattern. The Cal- 

 gary examples, though with shorter hook-like extremities than is the 

 case in the Utah and Californian insects, are certainly coretas and not 

 argiadcs. This also applies to specimens from Victoria, B. C, whilst 

 the Southern examples have developed their prehensores far away 

 along the coretas line and quite apart from the European argiades. The 

 position is full of interest and will need further investigation later on. 



We now come to the relationship of comyntas to amyntitla. 

 It has been shown from the genitalia (of which I give three 

 figures one from Jamesburg, Middlesex, one from Michigan 

 and one from New Mexico) that comyntas is distinct from 

 coretas, though allied to it. The falces of the tegumen are 

 quite different, in their fine hooked extremities, to the straight, 

 small spike of coretas ( this is well seen in the figure of the 

 Jamesburg specimen), whilst of course the insect itself is very 

 different in general appearance. The genitalia of the Michi- 



