MORGAN HEBARD 53 



Agroecotettix tnodestus crypsidomus now subspecies^ (Plate II, fijis. 4, 5 



and 6.) 



1917. Agroecotettix vwdestus Hebard, Proe. Acad. Nat. Sci. Phila., 1D17, p. 

 263. [ 9 ; Monclova, Coahuila, Mexico.] 



The present geographic race is separated from A. modestus 

 aristus, here described, l^y the average smaller size and less swollen 

 pronotum. Males are further separated by the shorter cerci, 

 the forks of which are much shorter, with the external arm short- 

 er than the internal arm. Females are less readily distingished 

 by the proportionately smaller tegmina, which are separated by 

 a moderate interspace. 



Compared with the type of A. modestus modestus Bruner, 

 a female, individuals of that sex of the present race are distin- 

 guished by their smaller size and red coloration of the distal 

 portions of the caudal tibiae. The slightly more swollen pro- 

 notum and form and position of the tegmina show a development 

 approximately intermediate between that of tu. modestus and m. 

 aristus. 



The discovery of males of m. modestus will aid greatly in de- 

 fining accurately the relative position of the races of the species. 



Type.- — cf : Marathon, Brewster County, Texas. Elevation, 

 3940 to 4160 feet. Septem})er 12, 1912. (Rehn and He])ard.) 

 [Hebard Collection, Type no. 750.] 



Agrees fully with »i. aristus, described on i)age 50, except in the following 

 characters Size smaller, medium. Vertex distinctly narrower. Inflation 

 of prozonal portion of pronotum less decided. Cercus about three times as 

 long as its proximal width, proximal portion narrowest at its median jKjint 

 (where it is about one-third as broad as long), due to the concavity of the dorsal 

 margin, ventral margin straiglit throughout, except that feeble convexity is 

 indicated proximad; internal section of distal ])ortion produced in a straight, 

 flattened finger, sulx'Cjual in width, about twice as long as broad, with internal 

 surface moderatelj^ convex and external siu'face flattened and moderately 

 oblique, apex rounded, this finger directed meso-caudad; external section of 

 dorsal j)ortion produced in a straight, rapidly tapering spike, with apex very 

 narrowly rounded, very slightly shorter than internal section and directed 

 caudad, so that the axes of these parts form an angle of something less than 

 ninety degrees. 



In the large series at hand the extremities of the male cerci show som-; 

 variation in length and form. The external production is usually decidciUv 

 shorter than the internal production, rarelj' nearly as elongate. 



^ From KpU']^(-0OiJ.o? = dwelling in secret places. 



TRAN.S. AM. ENT. SOC, XLVIII. 



