240 NORTH AMERICAN EUMASTACINAE (oRTHOPTERa) 



Allotype. — 9 ; Same data as type. [Hebard Collection.] 



The differential characters of this race are given above in the 



comparative diagnosis. 



Paratypic Series. — Ten adult males, one adult female and four 



immature females, all from Mount Tamalpais, August 23, 1907, 



taken at 1500 and 2100 feet, (M. Hebard), [Hebard Collection 



and Acad. Nat. Sci. Phila.]. 



Measurements {in millimeters). — These measurements are of maximum and 

 minimum specimens and of others noteworthy for special features. 



Length Length Length Length Length Length 



of of of of of of 



"71 body antenna pronotum cephahc median caudal 



O femur femur femur 



Momit Tamalpais, Califor- 

 nia, /j/pe 10.2 2.5 1.8 3.1 2.7 8.2 



Mount Tamalpais, Califor- 

 nia 10.9 2.8 1.6 2.7 2.5 8 



Mount Tamalpais, Califor- 

 nia, para/ype 10.5 2.5 1.8 3.1 2.7 8.7 



Mount Tamalpais, Califor- 

 nia 10. 5 2.8 1.7 3.1 2.7 8.5 



9 



Mount Tamalpais, Califor- 

 nia, o/Zo/ype 14 1.8 2.1 2.7 2.6 9.5 



Mount Tamalpais, Califor- 

 nia 14 .4 — 2 2.5 2.5 9 



Mount Tamalpais, Califor- 

 nia 15.5 2.3 2.1 2.8 2.8 10 



Mount Tamalpais, Califor- 

 nia 17.5 2.3 2.1 2.8 2.7 10.1 



Color N^otes. — When compared with M. c. californica the series of the present 

 race is seen to show no individuals with sohd or complete dark lateral bars, these 

 being indicated but in part and elsewhere lost in the generally more dark 

 grayish color of the specimens. The males rim through hair brown, mouse 

 grays, olive grays and fuscous, with relatively weak contrasts, rarely the dor- 

 sum is hoary and occasionally brick red or kaiser brown. The females are 

 occasionally uniform blackish, but the majority are uniform kaiser brown to 

 ochraceo US-buff. 



Distribution. — This geographical race is known only from 

 Mount Tamalpais, at elevations of from 1500 to 2586 (summit) 

 feet. Its range doubtless covers other mountainous areas in the 

 general vicinity of San Francisco Bay, which are of sufficient 

 elevation to carry the required habitat conditions. As shown 



