2.">8 DAVEXl'OUT ACADKMY OF NATURAL RCIKNOES. 



Fourtli lp<is: femur, »4giit m)n.,til)i:i eight in lu.. metatarsus tive and a half 

 mm., tarsus four mm., cdaws l.*} mm., femur with fine hairs, no sjtines, tibia 

 with fine hairs, some k)ug, and several spines toward the extremity, that at 

 the end being largest and hmgest; metatarsus with fine irregular hairs; nine 

 spiny hair.^ at regular intervals below, not reaciiing to the extremity; several 

 other irregular spines; tarsus hairy and with a number of spines below. 



Third legs; tibia five and a halfjmm. with spines on outer e.xtreinity; met- 

 atarsus five mm., with two rows of dorsal spines, six outside, four inside; 

 one row of three ventral spines; hairs as usual fine and unequal; tarsus two 

 mm. long with usual brush of hairs beneath. Abdonien oval, rounded, 

 sligiitly hairy ; genital opening a longitudinal slit in a slight elevation. A 

 pair of spiracular openings on the posterior portion of each of the seeimd 

 and third segments, none on the fourth. 



One -, Museum Acad. Nat. Sci.. Piiila. Ark., Capt. Many. [Description 

 written October 22, 18H0.J 



|A diccounectcd slip in Mr. Piiiuam'is paperi- coutains The aljovi' specitic name, and if 

 the Bpecies prove.^ distinct it may jjroperly be retained.— H. O.] 



DATA^tKS CONSTUICTA, PUTXAM. 



* Length, twenty mm.; color.s, top of head and base of mandibles red- 

 dish ochre yellow, limbs same (rolor, but paler, becoming .still lighter at the 

 extremities. Abdomen above, dark olive brown. pr)sterior I)order of each 

 segment giayi.sh; also gray specks all over; jaws of mandibles dark red, 

 changing to lilack at the points; under side of abdomen like upper, but more 

 yellowish, especially towards the posterior; eye prominence, and front bor- 

 der <jf head bliiok; tips of claws brown; eyes gray; mandibles with stout 

 spiny bristles; a brush of long hairs inside of the upper fingers; contracted 

 very suddenly at the fingers, which aie slender and spine-like. 



Head seven mm. wide, five mm. long, without median stria; hairs irreg- 

 tdar, mostly fine, but some of them si)iny. especially at the sides and in 

 front; eye prominence, moderately large, projecting over the margin where 

 it is prolonged into an acute point furnished with a numlx'r of hairs, two of 

 which on the front are larger than the others; eyes rather large, their inter- 

 val greater than tlx'ir diameter; mandibles, base three and a half mm.; up- 

 per finger fi\e n>m. long; base only moderately convex, suddenly constricted 

 at the upper finger, furnished with numerous spines and spiny hairs, and a 

 few fine haiis ; upper finger subulate, slightly arched, ilirected obliquely down- 

 ward and slightly outward, unarmed; furnished on tiie inside with the usual 

 brush of stiff liairs directed forwards; no flagellum. ('• P^tud") of the jaw 

 prolonged anteriorly into a conical |)rojection su]iporting the teeth. Teeth 

 commencing above with two minute teeth on tlie median line, then dividing 

 into two series with a cavity between ; the outer row consists of four teeth of 

 whid) the first (uppermost) is largest and projects farthest to the front. The 

 second is very small, the third is a little snmller than the first, and the fourth 

 is about the sanie size as the second. The inner row consists of three good 

 sized teeth, the first largest, third next, second next. Lower finger regularly 

 curved without ccmstriction ; a large tooth near the base concave behind con- 



