12 



spines ; terminal spines as in stygia, but smaller, the longest "with 

 scarcely perceptible hairs. Longer spines movable ; tips of spines and 

 claws, reddish black. 



Ovipositor reddish brown, darker at base, a little curved and slight- 

 ly turned upwards at the tip, which is produced to a fine point ; the 

 inner valves are as in stygla, with the dull points produced to delicate 

 spines, the terminal ones slightly recurved and none concealed by the 

 upper Valves ; anal cerci brown with long fine hairs, longer in the 

 male than in the female. 



Measurements. Average of many Specimens. Anterior 

 femora, .24-inch; ant. tibiae, .26-inch ; middle femora, .24-inch ; mid- 

 dle tibite, .26-inch; posterior femora, .55-inch; post, tibise, .58-inch; 

 antennsB (longest), 1.86-inches; maxillary palpi, .25-inch ; ovipositor, 

 .34-inch; cerci, $ .19-inch; Q .12-inch; whole body .80-inch. 



Obtained on islands in the Gulf of Georgia, under stones, by Mr. A. 

 E. R. Agassiz, after whom I take pleasure in naming it. The speci- 

 mens are in the Museiun of Comparative Zoology, at Cambridge. 



Rapliidophora xanthostoma, nov. sp. 



Body brown, pro- and mesonotum faintly mottled with yellowish 

 brown. Head (except the parts of the mouth) dark brown, mottled 

 with pale yellowish ; labrum, mandibles, maxillas, labium, and labial 

 palpi bright straw yellow, with some reddish spots ; maxillary palpi, 

 brown and dirty yellow ; tubercle of the vertex ridged with dirty 

 yellow, and upon either side a yellow spot ; antennse reddish brown, 

 first two joints darkest, first joint flattened at the base, slightly exca- 

 vated exteriorly, obliquely truncated interiorly on the basal half, 

 truncated obliquely at the extremity ; second joint, cylindrical, half as 

 broad, and one third as long as first ; third, twice as long as second, as 

 broad as it is at its junction, narrowing slightly, remainder subequal, a 

 little shorter than second. Eyes subovate, globose. 



Sides of thoracic segments emarginate, edged with yellow becoming 

 paler on the metanotum, and reddish on the anterior of pronotum. 

 Legs reddish brown, darkest at the extremities of femora and bases of 

 tibiae ; both sides of posterior tibiae faintly spotted with equidistant 

 yellowish spots ; four anterior tarsi yellowish, with very faint brown 

 bands across the sides ; posterior tarsi brown with the joints tipped 

 with yellowish, and having a faint dirty yellow line beneath. Outer 

 posterior edge of anterior femora not covered, as the others, with fine 

 spines ; both under edges of middle femora spiny at their terminal 

 half; inner lobe of the extremity of two posterior pair with a small 

 spine ; both upper edges of posterior femora supplied with fine spines 

 as far as basal half of the swollen portion ; three, pair of dark brown 

 spines at the extremity of posterior tibias, of which the middle is 

 largest, fully twice as long as the others, with a few very fine short 

 distant hairs upon it, the other spines reddish brown, except the bases 



