G. C. DAVIS. 213 



Two females and seven males from Nevada, Montana and Wash- 

 ii^gton. 



'Tri<clistus cnrvator Fab. (Ichneumon), Ent. Syst. 117, 182 (1793). 

 Exochus falvipes Cress.. Prcic. Ent. Soc. Phil, iii, 285. 

 9 % ■ — 7-8 mm. Differs from congener in having the legs entirely ferruginous : 

 antennae more or less rufous at base, paler beneath, and in having the wings 

 nearer hyaline. 



Six females and five males, Michigan, Illinois, Canada, New 

 Hampshire, Pennsylvania, New Jersey, Colorado, Montana, Nevada, 

 So. California and Washington. 



TricliKtiis pyginieiis Cress. {Exochns), Proc. Ent. Soc. Phil, iii, 28.5. 



9. — 4 mm. Differs from cnrvator by being smaller, having the antennre en- 

 tirely dusky rufous, mouth-parts rufous, areolet larger, legs fulvo-ferruginous. 

 posterior tibife and tarsi being yellowish white ; abdomen shining, without punc- 

 ture and without groove or carinfe at base. 



Two specimens, Illinois, Canada (Cresson). Type, coll. Amer. 

 Ent. Soc. 



Triclistiis apicalis Cress. (Exochns). Proc. Ent. Soc. Phil, iii, 285. 

 T. terminalis Ashm., Trans. Amer. Ent. Soc. xxiii, 201. 

 % 9 ■ — 8 ram. Black, with venter and two apical segments of abdomen rufous ; 

 legs vary from a piceous black to ferruginous, with black coxse ; face, orbital lines 

 and mouth-parts vary from lemon-yellow to a brown rufous ; wings hyaline, 

 veins and stigma reddish brown ; thorax and entire abdomen pitted- with coarse 

 punctures: basal segment of abdomen without carinse ; abdomen is deep, oval. 



Five specimens, Illinois, Massachusetts, New Hampshire and Dis- 

 trict of Columbia. Type, coll. Amer. Ent. Soc. 



Tricli«tiis ferrugineiis Ashm. (Amewli/tus), Tr. Am. Ent. Soc. xxiii. 201. 



9. — 6-8 mm. Honey-yellow, with face, vertex, except ocelli, which are dark, 

 tegulfp,, line in front, more or less of four anterior legs, and of the hind legs the 

 trochanters, apex of coxse and femora, middle half of tibias and tarsi, yellowish 

 white: base and apex of hind tibiae nearly black; antennae dark brown; wings 

 hyaline, veins and stigma color of body, areolet wanting, submedian cell much 

 longer than median ; basal segment of abdomen with central groove, margined 

 by distinct converging carinae. which disappear a little beyond the middle ; ovi- 

 positor ventral ; head and thorax pilose. 



Four females from Texas. Type, coll. Ashmead. 



Triclistii$« thoraciciis Ashm., Trans. Amer. Ent. Soc. xxiii. 201. 



9 . — 7 mm. Rufous with legs lighter, and head, antennae and apex of abdomen 

 dark to piceous; wings hyaline, nervures and stigma piceous, areolet present, 

 petiolate; no distinct carinse at base of abdomen, metanotum scarcely carinate at 

 l.'ase. 



Type from Virginia, coll. Ashmead. 



TRANS. AM. KMT. SOC. XXIV. AUGU.ST, 18!»7. 



