6 
It has already been stated that distinctive colour differences between 
the sexes occur in a few species; but a more remarkable condition is found 
in A. laetifica Lee., in which the elytra of the male are black, shining, and 
coarsely punctured, whereas those of the female are red, opaque, and finely 
punctured. 1 
Wing Venation 
The venation of the wings in the Lepturini presents several interesting 
features, some of which may be utilized in the classification. 
The two most striking characters are the condition of the closed cell 
in the radial sector and the presence or absence of a closed cell in the anal 
sector. 
In the genera Leptura and Bellamira , the cell in the radial sector is 
very elongate, with the extension of Radius arising from near the middle 
of the caudal margin. In Anoplodera and most of the other genera this 
cell is short and subtriangular, approximately as wide as long. It is inter- 
esting that the species of Typocerus, which European writers have placed 
as a subgenus of “Strang alia,” ( Leptura of this paper) have the short, wide 
cell of Anoplodera. Typocerus , however, has the cubito-anal cross-vein 
similar to Leptura. In A. insignis Fall the radial cell is somewhat as in 
Leptura . In A. ocionotaia Bay, aspera Lee., and mutabUis Newm., the cell 
is somewhat elongate, but the cross-vein forming its proximal margin is 
directed latero-caudad. 
The closed cell in the anal sector is found in North American genera 
only in Stenocorus , Anthophilax, Centrodera, Pachyta , and Leptacmaeops , 2 
and serves to distinguish these genera as a separate group. Our con- 
clusion that ( Pachyta ) rugipennis Lee. should be removed from the genus 
Pachyta was confirmed by the absence of this cell from the rugipennis 
wing. The genus Leptacmaeops was recognized by Colonel Casey as distinct 
from Acmaeops , and the presence of the anal cell in the species of Lep- 
tacmaeops connects the genus definitely with Pachyta and its allies. 
The junction of the first anal with the cubito-anal (C.A.) cross-vein 
varies from gradually arcuate in Pidonia, Grammoptera, and Alosterna , to 
strongly arcuate, nearly at a right angle, in Anoplodera , to strongly angular 
and recurrent in Leptura. There are many variations. A. sanguinea Lee., 
vittata Oliv., and octonotata Say, have this character nearly as in Pidonia , 
whereas in A. chrysocoma Kby., it is similar to Leptura. 
In some sections of Anoplodera and allied genera the outer section of 
the anal veins, between Cubitus and 2nd Anal, is reduced in density, 
whereas in Pidonia, Grammoptera, and Alosterna this region is greatly 
strengthened, although the cubito-anal cross- vein itself is in many cases 
reduced. A. vittata Oliv., L. lineola Say, and some others resemble Pidonia 
in this character. The venation of A. vittata Oliv. resembles Pidonia more 
closely than Anoplodera. The chief stress-bearing veins of the wing, 
Radius, with radial cell, Media, Cubitus, and 2nd Anal, show little vari- 
ation in wings of the same species; but the outer part of the 1st and 2nd 
Anals, between Cubitus and 2nd Anal, show distinct variation in the 
l A description of the male genitalia of the Lepturini, revealing interesting group characters, 
may be presented in the second part of this paper. 
*Xylosteus and Piodes are included in this group on other characters, although their wing vena- 
tion has not been examined. 
