74 HEMIPTERA-HOMOPTERA. 
&. Triquetra valida, Walk. List of Homopt. Ins. ii. p. 524°. 
Thelia obliqua, Walk. Ins. Saunders., Homopt. p. 73°. 
Hemiptycha viridissima, Walk. List of Homopt. Ins. ii. p. 572°. 
Hyphinoé viridissima, Butl, Cist. Ent. 1. p. 345°. 
Hab. Mexico }~“, 
There is only one (male) specimen of this species in our collection; but it is well 
represented in the Vienna Museum and the Royal Belgium Museum, and there are 
examples in the British Museum. It varies very considerably in colour; the greenish 
form is the Hemiptycha viridissima of Walker, which Stal writes as a synonym of 
H. camelus. Mr. Butler is of opinion (Cist. Ent. ii. p. 345) that Walker's species ought 
to be retained as distinct, but after examining a considerable series of the insect I cannot 
agree with him, and, moreover, he appears to have confused the sexes, for he says:— 
“We have three examples of each form; and H. viridissima not only differs in size and 
colour, being much larger and greener than 4. camelus, but it has considerably longer 
tegmina, is far more coarsely punctured, has the front margin of the pronotum bracket- 
shaped, the humeral horns prominent, and the posterior process longer.” I have 
examined these six specimens carefully and find that, of the three insects named 
camelus, two are males and one has the abdomen wanting, whereas the three named 
viridissima are females; the specimens of viridissima in Signoret’s collection are also 
females, and it may therefore be presumed that that insect must rightly be considered 
a variety of the female of camelus. 
There is another variety, which seems to be confined to the male, which has the 
front and the dark dorsal portions of the pronotum of a deep purplish colour and a 
variable dark spot on the upper surface just below the horns, which is wanting in the 
type form; the tegmina also are darker than in typical H. camelus. There are four 
specimens of this variety, labelled ‘ Bilimek, Mexico, 1871,’ in the Vienna Museum 
collection. ‘The difference between the sexes is not nearly as marked in this species as 
in the preceding. 
8. Hyphinoé asphaltina. 
Hemiptycha asphaltina, Fairm. Ann. Soc. Ent. Fr. sér. 2, iv. p. 319, t. 6. fig. 20°. 
&. Hemiptycha apriformis, Walk. List of Homopt. Ins., Suppl. p. 144’. 
9. Hemiptycha pubescens, Walk. loc. cit. p. 144°. 
Hyphinoé morio, Stal, Ofv. Vet.-Ak. Férh. xxvi. p. 257 (1869) *. 
Hab. Muxico! (Sallé?*), Jalapa (Hoge), Teapa in Tabasco (H. H. Smith); GuaTEmata, 
Purula and Senahu in Vera Paz, El Tumbador, San Isidro, Volcan de Atitlan 2500 to 
3500 feet, Capetillo (Champion); Panama, Bugaba, Volcan de Chiriqui 4000 to 5000 
feet (Champion).—CotomBia, Bogota*; VENEzUELA (coll. Signoret). 
There is a good series of this species in our collection. The specimens are very 
