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 tibiae 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, 

 Teai3a in Tabasco in March, and taken by Schumann about 

 Atoyac in Vera Cruz. 



3. JoppiDiuM ARDENS, Cress. 

 Proc. Acad. Philad. 1873, p. 139, male and female ; J. ruficolle, 

 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. pi. ix. fig. 16, female. Known by 

 the constantly black meta- and red meso-thorax, the black hind 

 tibiae 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 C^RULEIPENNE, Cam. 



Biologia Centr.-Amer. 1885, Hym. i. p. 211, pi. ix, fig. 17, male 

 and female. 

 Extremely similar to J. fuscipenne, Brulle, but quite certainly 

 distinct in its larger size, broader wings with strong cserulescent 

 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 Eev. T. A. 

 Marshall — probably ex coll. Andre— though the abdomen is 

 mainly ferrugineous. 



5. JOPPIDIUM APICALE, CrCSS. 



Trans. Amer. Ent. Soc. 1872, p. 160, female. 

 "Quite distinct from ruhriceps by the colour of the legs and 

 abdomen " ; the former are testaceous with their hind tibiae 

 and tarsi flavidous, the coxae 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 



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