$Ceratinella lætabilis.$--This is about the same size as _fissiceps_,--a sixteenth of an inch long,--but much darker colored, and the males do not have horns or humps on the head. The cephalothorax and sternum are dark brown, and the legs dark orange. The thickened circle on the abdomen (fig. 368) is dark orange brown and the thinner parts gray. In the female the thick circle is usually wanting and the whole abdomen dark gray, with lighter spots around the muscular marks. There are also hardened spots around the stem of the abdomen and under the spinnerets in both sexes. The head is slightly elevated behind the eyes, a little more in the male than in the female. The male palpi (figs. 369, 370) are shorter and stouter than those of _fissiceps_. It lives in dead leaves and moss, sometimes under stones, and is sometimes found flying in the autumn. [Illustration: FIGS. 371, 372, 373. Ceratinella fissiceps.--371, varieties in the form of the head. 372, 373, palpus of male.] $Ceratinella fissiceps.$--These little spiders are among the smallest species, measuring only a sixteenth of an inch in length. The cephalothorax and abdomen are short and round, and the abdomen has a round thickened spot on the back, more deeply orange colored than the part around it. The head is black around the eyes, and a black line extends backward half the length of the cephalothorax. The head of the male extends forward over the mandibles, carrying with it the front middle eyes, and above it is a rounded hump with the hind middle eyes. The pairs of lateral eyes are opposite the crease between the humps (figs. 371). The female has at the same point a slight crease across the head and an elevation before and behind it. They are very common on low bushes in summer and under leaves in winter, and are occasionally seen in the autumn flights. [Illustration: FIGS. 374, 375, 376. Cornicularia directa.--374, male enlarged sixteen times. 375, head of male showing the double horn. 376, head of male from above.] $Cornicularia directa.$--The males and females are of the same size and about a twelfth of an inch long. The cephalothorax is brown, varying in different individuals. The abdomen is gray, with the muscular spots lighter than the rest. The cephalothorax is long, narrowing gradually toward the head. In the males there is a slender horn extending forward between the eyes, a little thickened at the end and covered on the upper side with stiff hairs in rows (fig. 376). Under this horn is a smaller one about half as long and close against it (fig. 375). In females the horns are absent, but the shape of the head and arrangement of the eyes are the same, except that the eyes are closer together. There are several other species of Cornicularia, some with similar horns and others with single horns on the heads of the males. They are found under leaves in winter, on plants and fences, and among the flying spiders in autumn.