380 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



of the female about three times as long as the basal wfdth, uniformly 

 tapering-, of the male (fig-. QQ) broad and stout, separated at the base 

 by a space about one-half as wide as the basal breadth of one, the inner 

 tooth slender and much less in diameter than the apical portion of the 

 cercus; last dorsal segment of the abdomen apicall}^ concave and 

 depressed, forming two small rounded lobes. Elytra as broad as and 

 more than one-half as long as the pronotum, and 

 overlapping above in the male, in the female mere 

 lateral pads. Legs with the anterior coxal spines 

 long and distinct; posterior femora as long as the 

 body, about three times as long as the pronotum, 

 Fig. g6.— idiostatus bi. stout, swollcn on the basal two-thirds and without 

 LiNEATA. CERCUS AND geulcular splucs; anterior tibiae spined above on 



LAST DORSAL ABDOMI- ,, , . , ..i ,i • • , ^^ , ,•^ • 



NALSEGMENTOFMALE. ^he outcr Side With three spines; intermediate tibi^ 

 spined above on both margins; posterior femora 

 and tibiffi armed below with a row of short, dull, black spines on both 

 carina^. 



Color (alcoholic), after Thomas. 



Dorsal portions throughout pale olive, striped with yellowish lines. Two rather 

 narrow yellowish lines (one from each eye) extend back along the entire length to 

 the tip of the abdomen; each abdominal segment is margined posteriorly with a 

 quite narrow yellowish line; the lateral margins are marked with a somewhat broader 

 line of the same color. Face and entire ventral surface pale yellow. Legs purplish 

 externally. The olive of the abdomen and pronotum is more or less slightly tinged 

 with rufous near the margins of the spaces. 



I have seen no material fit for stud}^ with relation to coloration. 



Measurements. — Length, pronotum, male, 9 mm., female, 10; 

 posterior femora, male, 24.5-26, female, 28-31; elj^tra, male, 5.5-T, 

 female, 2; ovipositor, 30-32. Width, pronotum across metazona, 

 male, 6, female, 8. 



Type. — Apparently lost, 



Specimens examined. — Two pairs in the Scudder collection from 

 Fort Reading, Shasta A-^ alley, California, taken l)y Lieut. Williamson. 



This species was described by Thomas from a female taken by Hen- 

 shaw at San Carlos, Arizona. I have been unable to find this specimen 

 in any of the collections studied. The specimens in Scudder's collec- 

 tion are moldy and much worn and probably veiy poorl}' represent 

 the coloration of living specimens. 



This large bulky insect is conspicuously distinct from the other 

 members of the genus. The cerci of the males of this and the follow- 

 ing three species are in some respects similar and are very different 

 from the t3^pes represented by the preceding species. The last dorsal 

 segment of the abdomen also differs iiiateriall}- from those of the pre- 

 ceding forms. 



