294 ENTOMOLOGICAL SOCIETY 



Magazine for March, 1867. I have not seen the adult insect, 

 but Dr. Wilder a number of years ago sent me the cocoons. 



11. Pimpla scriptifrons Cresson. Trans. Am. Ent. Soc., Ill, p. T48. 

 Eleven males and one female reared from white cocoons in the 



egg-sac of Argiope riparia, District of Columbia, April, 1889. 

 (See Insect Life, Vol. Ill, p. 462.) 



12. Pimpla japonica Ashm. mss. 



One specimen reared from spider's egg from Japan. (See In 

 sect Life, Vol. Ill, p. 463.) This may be a Japanese species. 



13. Pimpla aquilonia (?) Cresson. Trans. Am. Ent. Soc., Ill, p. 145. 

 One female specimen of what may be this species reared from 



eggs of Epeira angulata, by Dr. A. Davidson, at Los Angeles, 

 Cal. Cresson's species was described from the male sex only and 

 from Maine. It is, however, the only described species which 

 Dr. Davidson's specimen resembles, and although the localities 

 are separated by the entire continent they may prove identical. 



14. Pezomachus unicolor Cresson. Can. Entom., Vol. IV, p. 64. 

 One female specimen collected on a fence across a meadow 



with many spiders, at Dedham, Mass., November 9, 1873, by J. 

 H. Emerton. I think this species was not actually reared, but 

 there is little doubt but that it is a spider parasite. 



15. Pezomachus obscurus Cresson. Can. Entom., Vol. IV, p. 62. 

 Four female specimens reared by F. M. Webster, at Columbus, 



Ohio, from the cocoons of a species of Micaria. 



16. Pezomachus micariae n. sp. 



Female. Length, 5 mm ; ovipositor nearly as long as last three abdomi 

 nal segments ; antennae short, stout, not longer than head and thorax 

 together. General color dull rufous, basal five joints of antennae lighter; 

 sutures of thorax and dorsum of abdomen behind the petiole black, the 

 second, fifth, sixth, and seventh abdominal segments edged with rufous 

 behind, the band on the second segment widest ; mandibles yellow at base. 

 Head, thorax, and abdomen very finely shagreened, shining. 



Male. Length, 6 mm. ; expanse, 12.4 mm. The rufous color applies to 

 entire abdomen and all legs, as well as to mandibles and mouth-parts. 

 Head and thorax dull black and delicately shagreened, except metanotum, 

 which is finely rugose and furnished with delicate irregular carinae form 

 ing a wide reticulation. 



Described from one male and one female, each reared from an 

 egg cocoon of Micaria, by J. H. Emerton, at Salem, Mass. 



17. Hemiteles prosthesimae Riley sp. n. 



Male. Length, about 5.5 mm. Head black, opaque, densely but finely 

 granulate, and with a fine, short pubescence; eyes large, convex; ocelli 

 in a triangle, pale; clypeus smooth, not distinctly separated at base; 



