1908] Araneae Theraphosae of California 215 



has already recognized this fact, and says: "Le genre Actinoxia 

 sera sans doute a supprimer et a reunir a Aptostichus, il est 

 base sur un tres jeune individu et ses caracteres tiennent peutctre 

 a I'age" (Hist. Nat. des Ar. II, Supp., p. 900). I have collected, 

 and have before me, one male and over seventy-five females, 

 ranging in length from 7 to 26 mm., not including several broods 

 of young taken from the nests of the parents, to be mentioned 

 later. A careful study of several individuals, ranging in length 

 from 7 to 1 2 mm . , has satisfied me that I have the species treated 

 as above by Simon. There is a specimen of this form, 14 mm., 

 long, in the collection here, labeled, "Actinoxia versicolor Simon, 

 det. by Banks." The adults, however, cannot be referred to 

 Actinoxia, nor can they be placed in Aptostichus; but their more 

 important and more constant characters conform best to Simon's 

 diagnosis of Eutychides (Ann. Soc. ent. Fr., 1888, p. 213), (Hist. 

 Nat. des Ar., I, p. 109), especially as to the posterior sternal 

 impressions and the armature of the pedipalps. The species 

 seems to be closely related to E. dugesi Simon (Ann. Soc. ent. Fr., 

 1888, p. 214), but is certainly distinct. 



It is the most common trapdoor spider of the Santa Clara Val- 

 ley, the foothills and canons on cither side. It is the only form 

 that I found vvhile in Sonoma County. I did not find it in the 

 portion of Monterey County visited. Islr. Banks records it from 

 Sierra County (Proc. Cal. Acad. Scl.-Zool. Ill, 13, 1904, p. 332). 

 It is probably well distributed throughout the Coast Ranges of 

 California. 



As both male and female adults arc undescribed, I insert 

 rather full descriptions, including generic as well as specific 

 characters. 



Adult 9 (Plate XVI, fig. 1) — Length 26 mm.; cephalothorax 2 mm. long, 

 7 mm. wide; abdomen 12 mm. long. Cephlx. olivaceous- tawn^^ cephalic [jortion 

 darker, margins lighter, apparently glabrous, the scattered minute black setae 

 showing up only under a good lens, posterior margin u.suall}^ decidedh^ emargin- 

 ate; thoracic-pit jjrocurved; a row of much larger, black, cephalad-bent setae 

 along median line of caput, with a narrow glabrous space on each side; caput 

 high, prominent, rapidly narrowing within the middle third, slightly narrowing 

 thru posterior third (Plate XIII, figs. 7-8, 11—12); eye-tuber low, hardly one- 

 fotirth as high as long (i. e., longitudinal thickness) (Plate XIV, figs. 5-7); eyes 

 of the Amblyocarenum tj-pe, anteriors nearly equidistant, P. L., nearly as large 

 as A. L., P. M. not constant in size or shape (some individual variations shown 

 in Plate XIV, figs. 9-12 — fig. 13 showing an abnormal lack of two posterior eyes 

 on one side), A. L.. and A. M. dark blue-gray, P. L. dull 3"ellowish, P. M. shining 

 silvery-white. Chelicerae dark reddish, long setose at the apex with attenuating 

 tongues of setose areas reaching to the base above (Plate XIII, figs. 11—12), with 

 a slight obtuse process at the apex within (more noticeable if mounted in balsam) 

 rake (Plate Xlll, figs. 1.5-18) of many teeth, but only four in front, two of which 

 are on the low process, a proininent row of fi\-e or more teeth extending up the 



