MEXICAN ORTHOPTERA. 95 



Orphiilella viridescens Scudder. 



1899, Orphulella viridescens Scudder. Can. Ent., xxxi, p. 187. July, 1899. 



Four specimens ; two males, two females ; Eslava, D. F., x. 



The measurements of the females are slightly smaller than those 

 of the type specimen. Inasmuch as the male was previously un- 

 known, a short de.scriptiou would not be out of place. 



Form rather heavy. FastiKiuin acute-angulate, scutellum slightly foveolate. 

 Vertex rec.tangulate ; the face from between the anten use retreating decidedly. 

 Frontal costa very much constricted apically, slightly expanding and becoming 

 obsolete inferiorly, not suU^ate, delicately punctate. Eyes moderately prominent, 

 subpyriform, the anterior margin flattened. Antennae red, as long as the head 

 and pronotum, depressed. Pronotum with the carinse equally distinct, the 

 lateral ones being most approximate half way between the anterior border and 

 the transverse sulcus, diverging posterior to the constriction, the angle of diver- 

 gence not so great on the metazoua. Transverse sulcus dividing the pronotum 

 slightly back of the middle. Anterior margin of the pronotum truncate, poste- 

 rior rotundatoangulate. Tegmina equaling the hind femora, the pattern the 

 same as in the female; but the central line, which is very pale in the female, is 

 very marked, and the roseate tint is absent. Hind femora longer than the abdo- 

 men, rather robust; the tibige with eleven to thirteen spines on the external mar- 

 gin. Cerci attenuate, slightly incurved at the tips. Subgenital plate acuminate, 

 moderately punctate. 



General color reddish brown, variegated with light green. Eyes ochraceous 

 suffused with grayish. Antenuaj purplish. A dorsal streak of green extends 

 from the vertex to the tip of the tegmina, though on the head and prozona it is 

 suffused with brownish, and touched on the latter with yellowish. The post 

 ocular stripe is represented by a darker band of brown ; posterior two-thirds of 

 the metazona above with a lateral bar of blackish. Tegmina blackish, except 

 the anal and costal fields which are green. Abdomen dull purplish red. Lower 

 face yellowish white. Anterior limbs pale purplish red ; median limbs with the 

 tibige the same, the femora being greenish yellow. Posterior femora purplish 

 red, touched with greenish centrally; posterior tibiae dull purplish gray. 

 Measurements : 



Length of body 15 mm. 



Length of tegmina 12.5 '* 



Length of hind femora ...... 10 " 



Length of antennae ....... 5.75" 



Plectrotettix viHtoriti!« Saussure. 



1861, Stenohothrus viatorius Saussure, Eevue et Magas. de Zool. (2), xiii, p. 317. 



Seven specimens; five females, two males, Tacubaya, D. F., v, 

 and Cuernavaca, Morelos, vi and ix, '98. 



■ These specimens show a great variation in coloi-, the two males 

 being very dark, one having the lateral carina? on the metazona, 

 the posterior border of the prozona, and the anterior border of the 

 lateral lobes of the ])ronotum pale yellowish. 



TRANS. AM. ENT. SOC, XXVII. OCTOBER, 1900. 



