A MONOGRAPH OF THE GENUS JOPPIDIUM. 139 
by the very different sculpture of the metathorax. The males of 
the two species are very distinct.” This is a shining black 
insect with all the tibie and tarsi conspicuously flavous. In 
the National Collection are half a dozen examples, comprising 
both sexes, from Xucumanatlan in Guerrero at 7000 ft. in July, 
Teapa in Tabasco in March, and taken by Schumann about 
Atoyac in Vera Cruz. 
3. JOPPIDIUM ARDENS, Cress. 
Proc. Acad. Philad. 1878, p. 189, male and female; J. rujicolle, 
Cam. Biologia, p. 210. 
First described from Cordova; Isthmus of Tehauntepec; but 
a very common species, and obviously the same as Cameron’s 
J. ruficolle, figured at Biol. pl. ix. fig. 16, female. Known by 
the constantly black meta- and red meso-thorax, the black hind 
tibiz with their basally pale tarsi. Over sixty examples were 
found in Mexico at Chilpancingo at 4600 ft. in July, Atoyac in 
April, Xucumanatlan at 7000 ft., Dos Arroyos in Guerrero at 
1000 ft. in September, R. Papagaio in Guerrero at 1200 ft. in 
October, Amula at 6000 ft. in August, Venta de Zopilote at 
2800 ft. in October, Acaguiztla in Guerrero at 3500 ft. in October ; 
Temex by Gaumer ; Tierra Colorado; and by Champion at San 
Geronimo, whence is Cameron’s type in the British Museum, in 
Guatemala, and San Joaquin in Vera Paz. 
4, JoPPIDIUM CHRULEIPENNE, Cam. 
Biologia Centr.-Amer. 1885, Hym. i. p. 211, pl. ix, fig. 17, male 
and female. 
Extremely similar to J. fuscipenne, Brullé, but quite certainly 
distinct in its larger size, broader wings with strong cerulescent 
reflection, black hind tarsi, distinctly antefurcal basal nervure, 
and especially in the glabrous and glittering metanotum. 
Apparently a rare species; the male, taken by Champion at 
David in Chiriqui (and figured in Biologia), is not in the 
National Collection, though the female type, found by Boucard 
in Panama, is there along with a male, labelled ‘‘ Amerique 
meridionale,’ and correctly named by the late Rev. T. A. 
Marshall—probably ex coll. André—though the abdomen is 
mainly ferrugineous. 
5. JOPPIDIUM APICALE, Cress. 
Trans. Amer. Ent. Soc. 1872, p. 160, female. 
* Quite distinct from rubriceps by the colour of the legs and 
abdomen”; the former are testaceous with their hind tibize 
and tarsi flavidous, the coxe with hind femora and trochanters 
black; the latter is ferrugineous, basally nigrescent. One female 
in the British Museum was captured by Herbert H. Smith at 
M 2 
