308 THE CANADIAN ENTOMOLOGIST. 



TWO NEW SPECIES, OF THERIDIID^. 



BY CYRUS R. CROSBY, ITHACA, N. Y. 



Theo7ioe stridula, new species. — Male : Length, .78 mm.; cephalo- 

 thorax, wide .35 mm., long .39 mm. In the following table the measure- 

 ments are given in millimeters : 



LEGS. I. II. III. IV. 



Tar 24 .22 ,2 .24 



Met t8 .16 .14 .17 



Tib 24 .19 .16 .25 



Pat . 13 ,12 .11 .12 



l^^em 36 .3 .25 .34 



Cephalothorax short and moderately elevated, sides arcuate, slightly 



narrowed in front, dull grayish-yellow, eyes surrounded by narrow black 



rings ; posterior eyes in a slightly recurved line, equal, the median 



separated from each other by one and one-half times their diameter, and 



from the lateral by one-half their diameter ; anterior eyes in a very slightly 



procurved line, subcontiguous, the median' smaller than the lateral; 



median ocular area wider behind than in front and wider than long. 



Ciypeus protruding, slightly convex and slightly wider than the ocular 



area. Chelicerae longer than the ciypeus and paler than the rest of the 



cephalothorax. Sternum strongly convex and nearly circular, widely 



separating the posterior cox^e, dull yellowish-brown, bordered on the sides 



and behind with dark gray, sparsely and evenly clothed with small erect 



hairs, labium and endites lighter in colour. Abdomen dark gray, in life 



probably nearly black, beneath the same colour, except the strongly 



developed epigastric sclerite, which is grayish-yellow. Stridulating organ 



present as two short broad teeth on the front of the abdomen, just above 



the pedicle, which are opposed by striated areas on the posterior part of 



the cephalothorax. Legs yellowish, patellae much lighter. The so-called 



auditory hairs are arranged as follows : On the first and second pairs of 



legs, two near the base of tibia, one on the basal half of metatarsus and 



one on basal third of tarsus ; on the third pair, three near the base of 



tibia, none on metatarsus, one on basal fourth of tarsus ; on the fourth 



pair, three on tibia, one at middle and two on basal half, none on 



metatarsus, one on basal fourth of tarsus. Palpus with the femur rather 



long, curved slightly inward^ patella short and curved, tibia a little longer 

 and prolonged on the ui)per outer side, so that the bulb is contained in 

 the angle between it and the tarsus. 



September, 1906 



