Fig. 381. HEAD OF 

 DELORRHIPS UNICORNIS 



Superfamily Argiopoidea 



preceding species in size, being one sixteenth inch in length. It 

 differs in lacking the transverse furrow on the head, in being of 

 a darker colour, and in the female in usually lacking the shield 

 on the dorsal aspect of the abdomen. The cephalothorax is dark 

 brown, the legs orange. The dorsal aspect of the abdomen of 

 the male is covered with a dark orange-brown shield, in the 

 female this shield is usually reduced to four dots. In both sexes 

 there are shields on the ventral aspect, one in front of the spin- 

 nerets and one on each side at the base of the abdomen. 



Delorrhips unicornis (De-lor'rhips 

 u-ni-cor'nis). — The cephalothorax and 

 legs are yellowish, the abdomen, olive- 

 gray. The male is easily recognized 

 by the presence of a long horn project- 

 ing from the middle of the clypeus 

 (Fig. 381); this horn is clothed with 

 stiff hairs at the tip. Another striking 

 feature is the great length of the apophy- 

 sis of the tibia of the male palpus, which is sickle-shaped and 

 longer than the body of the segment. The length of the female 

 is one sixteenth inch; of the male, a iittle less. 



Prosopotheca directa (Pro-sop-o-the'ca di-rec'ta). — The cephalo- 

 thorax is brown, the abdomen, olive- 

 gray; the length of the body is one 

 twelfth inch. In the male there is a 

 horn projecting forward from the eye- 

 space and a smaller born below this 

 (Fig. 382). 



Tracbelocamptns rostratus (Tra-chel- 

 o-camp'tus ros-tra'tus). — This is one 

 of a group of species in which .the males 

 have cavities in the head opening by 

 holes near the eyes. In the male of 

 this species there is a prominent hump on the head which bears 

 the posterior median eyes; and on each side at the base of this 

 hump and just behind the lateral eyes there is a hole (Fig. 383). 

 The length of the body is one twelfth inch. 



Qzdotkorax montiferus (CE-do-tho'rax mon-tife-rus). — The 

 cephalothorax is dark yellowish brown; the abdomen, dark gray; 

 and the legs, orange-brown. On. the cephalothorax of the male 



Fig. 382. HEAD OF 

 PROSOPOTHECA DIRECTA 



372 



