NO. 1124. RE VISION OF T7/7-: M I'.L . I XO PL / ,SV n>DER. 2 7 



6. BARYTETTIX, new genus. 

 (fiapvt, heavy; TSTTI^, grasshopper.) 



Body heavy, moderately compressed, thinly pilose. Head large, 

 moderately prominent, the vertex gently convex, not raised above the 

 level of the pronotuin, the fastigium descending with moderate rapidity 

 and the face retreating slightly; eyes very large, moderately promi- 

 nent, about equally so in the* two sexes, broadly ovate in the male, 

 elliptical in the female, much longer than the intraocular portion of the 

 genae; interspace between the eyes narrow, especially in the male, the 

 fastigium sulcate throughout, widening considerably beyond, the 

 frontal costa relatively broad, considerably broader than the interspace 

 between the eyes; antennae not very slender, long, half as long as the 

 body in the male. Pronotuin short, subequal, widening slightly at the 

 metazona, the front margin truncate and laterally plicate, the hind 

 margin truncate and emarginate, its dorsum gently convex, passing 

 insensibly into the vertical lateral lobes, a feeble percurrent median 

 carina; prozona transverse, especially in the female, sparsely punctate, 

 slightly less than twice as long as the densely punctate metazona, 

 crossed in the middle by a distinct transverse sulcus, followed at less 

 than half the distance to the metazona by a similar augulato-arcuate 

 sulcus. Prosternal spine bluntly conical, erect; interspace between 

 mesosterual lobes twice as long as broad in the male, subquadrate and 

 nearly as broad as the lobes in the female, the metasternal lobes rather 

 distant in the male, approximate in the female. Tegmina elliptical, 

 about as long as the prozona. Fore and middle femora very tumid in 

 the male; hind femora short and moderately stout; hind tibiae with 

 nine to ten spines in the outer series. Extremity of the male abdomen 

 subclavate, but with the subgeuital plate so produced posteriorly as to 

 form an exceedingly coarse and blunt conical tubercle, the lateral mar- 

 gins straight from the very base, the apical margin removed from the 

 tip of the supraanal plate by considerably more than half the length of 

 the latter; cerci large, laminate, arcuate, the augulate tip directed 

 downward; furcula composed of a pair of minute lobes. 



B. cmssus may be taken as the type of the genus. 



Two species are known, both from Lower California. 



ANALYTICAL KEY TO THE SPECIES OF BAKYTETTIX. 



Tegiuina unicolorous; hind margin of pronotum distinctly emarginate; frontal 

 costa sulcate throughout (male) ................................. 1. crassm (p. 28). 



Tegmina longitudinally bicolored; hind margin of pronotum very feetly emargi- 

 nate; frontal costa plane, or depressed only just below the ocellus (female). 



2. peninsulae (p. 28). 



