100 Journal New Youk EMroMOLUGiCAL Society. [vm vii. 



Pronotum black in a broad trapezoidal median region, separated from the apical mar- 

 gin by a very tine nul)ilous pale border not prolonged posteriorly at the middle, 

 and having, at each side behind the middle, a small lateral spur not extending 

 more than half way to the side margin, without trace of a pale spot before the 

 scutellum ; elytra much longer than wide, with an inner broad black vitta to 

 nearly two-thirds from inner third of the base, its posterior extremity subunited 

 with a slight dilation of the fine black sutural margin, the latter dilated near the 

 base, also with a broad vitta along the median line not united with the inner vitta 

 basally, extending unbroken from the base at outer two-fifths nearly to the apex, 

 angularly dilated within at the middle, and a fine external vitta from basal to 

 apical third or more ; legs black. Length 6.3 mm.; width 4.5 mm. Colorado. 



montana, sp. nov. 

 These species are all evenly oval and strongly convex, and vary 

 much less in size individually than is usual in this family. Siibvittata 

 of Mulsant, I have failed to recognize ; the description of the pronotal 

 ornamentation will not aj)ply, even approximately, to any form de- 

 scribed above. 



PSYLLOBORINI. 



In the structure of the front, the Psylloborini are evidently inter- 

 mediate between the Coccinellini and Epilachnini. The two follow- 

 ing genera are very closely related to each other, and inhabit the 

 eastern and western hemispheres respectively. The surface of the head 

 is pubescent in both. The body is small in size, convex, the pro- 

 notum small, diaphanous at the edges and broadly reflexed at the sides; 

 body pale in color, spotted with a darker tint above ; mesosternum 

 truncate, the claws with a large quadrate tooth internally at base. The 

 two genera before me may be characterized as follows : — 



Elytra more broadly refiexed at the sides ; scutellum well developed * Thea 



Elytra very narrowly reflexed at the sides, the scutellum minute. Psyllobora 



In almost every other character these two genera are so nearly 

 similar, that it might scarcely be conducive to taxonomic convenience 

 to maintain them distinct. Still, there are certain peculiarities in the 

 types of ornamentation that render them easily separable at first sight. 

 The genera Halysia and Neohalyzia are composed of larger species, 

 which also belong to the Psylloborini. 



Psyllobora Che%\ 



A large genus, of which but a small proportion of species have yet 



been described. As in many other genera, the same general scheme 



of arrangement of the elytral spots is common to many species, and 



the material of our fauna has never been critically examined. The 





