372 PHYTOPHAGA. 



fulvous ; antennae rather more than half the length of the body, gradually thickened, testaceous, the four 

 terminal joints darkened, the second joint thickened and scarcely shorter than the third, the latter 

 distinctly shorter than the following joint ; thorax transverse, fully twice as broad as long, the sides 

 rounded, the anterior and posterior margins straight, the latter with a slight depression in front of the 

 scutellum, the surface nearly black, with a few scarcely visible punctures ; scutellum black, rather 

 broad ; elytra rather depressed, slightly, but distinctly, widened posteriorly, with an obsolete depression 

 below the base, their surface closely and finely punctured, the punctures arranged somewhat in close lines ; 

 posterior femora piceous ; anterior legs entirely testaceous ; pygidium not covered by the elytra. 



Hob. Mexico, Jalapa {Ebge). 



The thorax is in this species much more transverse than in any other of the genus 

 known to me; this character, and the colour of the antennae and legs, will help to 

 distinguish P. mexicana from its allies. 



8. Phyllotreta crotchi. (Tab. XXI. fig. 17.) 



Greenish-black ; head and thorax closely punctured ; elytra distinctly punctured anteriorly, the apex scarcely 

 visibly punctured, testaceous, the lateral and sutural margins (the former widened at the middle, the latter 

 narrowed at the base and apex), and a small spot at the shoulder, greenish-black. , 



Length 1 line. 



Hab. Mexico, Ventanas 2000 feet {Forrer). 



A good many nearly similarly coloured species are known from Europe and North 

 America, from all of which I must separate the one under consideration on account of 

 the very broad testaceous band (which I have given in the description as the ground- 

 colour) of the elytra. The head is very finely and closely punctured, and has a very 

 short impressed line between the eyes ; the frontal tubercles are, as usual, obsolete, but 

 the carina is distinctly raised; the antennas have the third and fourth joints of equal 

 length, and are entirely black in colour, the second joint only having a slight dark 

 fulvous tint (in all the other allied species known to me the basal joints are more or 

 less testaceous) ; the thorax is of a transverse shape, and closely and more strongly 

 punctured than the head; the punctures of the elytra are placed in very closely 

 approached longitudinal rows ; the markings are almost identical in design with the 

 European P. sinuata, Redt., except that the testaceous band is much broader. 



P. ramosa, Crotch, from California, differs from the present species, according to 

 the description, by the pale basal joints of the antennae, and by the differently shaped 

 elytral vitta. Two specimens were obtained by Mr. Forrer. 



LONGITARSUS. 



Longitarsus, Latreille, Cuvier, Regne Anim. 2nd edit. 1829, p. 155 ; Leconte & Horn, Class. Coll. 



N. A. p. 353. 

 Teinodactyla, Chevrolat, Dej. Cat. 3rd ed. p. 416. 

 Thyamis, Stephens, Illust. Brit. Ent. iv. p. 424. 



Longitarsus, as its name implies, is principally distinguished from Aphthona and 

 Phyllotreta by the elongate first joint of the posterior tarsi. The species are very 





