248 NEW NORTH AMERICAN DECTICINAE 



Anabrus spokan" new species. (PI. IX, figs. 12, 13, 14 and 15.) 



The present species is readily distinguished by the presence 

 of a weak l)iit percurrent median carina on the pronotum, which 

 is strongest in the caudal portion, while the disk is defined by more 

 apparent lateral carinae which, though rounded, are well defined 

 caudad. In addition the male cerci are distinctive, though of 

 the same general type as developed in A. simplex Haldeman. 

 Nearest agreement with A. simplex maculatus Caudell is shown. 



Type. — c^ ; Sand Point, Lake Pend d 'Oreille, Kootenai County, 

 Idaho. Elevation, 2100 feet. August 2, 1909. (Rehn and 

 Hebard.) [Hebard Collection, Type no. 530.] 



Size rather small for this genus, wliieh includes only large sjjecies; about as 

 in A. ainipU'.r maculatus. Form normal, surface glossy. 



Vertex sHghtly over twice as wide as proximal antennal joint. Pronotum 

 strongly produced caudad, with caudal margin of disk very broadly convex, 

 almost transverse, very similar in form to that of simplex maculntus, but 

 differing signally in the following features: lateral margins of disk weak but 

 appreciable proximad, becoming well developed in caudal half, rounded but 

 much more decided than in simplex; median carina of disk percurrent, very 

 faint in i)roximal portion but more conspicuous in caudal portion. The 

 tegmina slightly surpass the pronotum, so that the heavily veined marginal 

 area is exposed. Prosternum unarmed. 



Abdominal tergites each showing a weak but distinct medio-longitudimd 

 carina in the caudal portion, except the peiuiltimate tergite, which is broad, 

 with surface weakly bilobate and caudal margin transverse, showing weak 

 concavity above each cercus, the median V-shaped portion composed of a 

 soft pliable integument, to the caudal margin of which the triangulate shield- 

 shaped supra-anal plate is attached. Cerci, as in simplex and simplex macu- 

 lalus, dividing into two arms, which, curving inward distad, are each termin- 

 ated in a long sharp tooth directed inward, but, unlike that species, the ex- 

 ternal or dorsal arm is considerably over twice as long to the point of inward 

 curvature as the internal or ventral arm. Subgenital plate with two heavy 

 round(Ml carinae in distal half, which terminate in two rather elongate styles, 

 the margin between these rounded rectangulate (varying in the series to ob- 

 tuse-angulate) emarginate. Styles cylindrical, nearly five times as long as 

 wide, showing a slight proximal decurvature. 



Cephalic coxae armed with a large, flattened, triangular spine, less than 

 twice as long as its basal width. Limbs rather plentifully supplied with min- 

 ute, short hairs, the sockets of these represented by minute pits, these par- 

 ticularly noticeable on the dorsal surfaces of the caudal femora. Cephalic 

 and median femora with ventral margins unarmed, except for one spine on 

 the ventro-cephalic margin of one of the former. Caudal femora with ventro- 

 external margin only armed with (two and three, two to nine in the series) 



"A branch of llie Salishan Family of Indians, known as the Spokan, in- 

 habited the region from which the j)resent species is known. 



