119 



Tentheedo. 

 Synonymy, Tenth. (AUant.) Family VI. Klug. 



Section 1. Taxonus. 



Tribe 1. 

 ^ Nigrisoma (n. sp.) 

 * Unicinctus (n. sp.) 



^ Tribe 2. 

 ^Dubitatus (n. sp.) 



3 Taxonus nigrlsoma (n. sp.) ? . (Length 0.30, Ex. 0.60 in.) 



? . Color, blue-black, legs yellow-red ; antennse slender, basal joint enlarged , 

 third longer than fourth, apical joint as long as preceding ; clypeus emarginate 

 angulate ; labrum and middle of mandibles pale-reddish ; legs red or honey- 

 yellow ; base of coxffi and tarsi black; wings hyaline; stigma and costa black, 

 costal space hardly visible. 



Two specimens. Massachusetts. Harris's Coll. and F. G. Sanborn. 



4 Taxonus unicincfus (n. sp.) $ (f. (Length 0.30, Ex. 0.60 in.) 



?. Black, a rufous band on fourth and fifth segments of abdomen ; third joint 

 of antennae longer than fourth, flagellum rufous beneath ; a blunt spine between 

 antennse ; labrum, mandibles, and palpi pale luteous ; tegulse, cox8B,and base of 

 femora white ; a spot at the tip of second and third segment of abdomen above, 

 the fourth and fifth, and also all of the third beneath, and the legs, honey-yellow ; 

 base of coxae, the anterior coxas above, and the posterior tarsi, black ; wings 

 hyaline ; marginal cross nervure straight, and received near third sub-marginal 

 nervure ; stigma and costa black. 



cf. Flagellum beneath rufous toward tip; spine between antennae not promi- 

 nent ; clypeus deeply emarginate, enclosing labrum, both white ; the four basal 

 segments of abdomen honey-yellow ; the four anterior tarsi paler than those of 

 female ; tips of posterior tarsi black ; dividing marginal nervure curved ; stigma 

 at base and costa pale. 



Hab. Farmington, Conn. 



Four specimens. One of the males ha3 red shoulders. I cannot be positive 

 that this is the male of T. unicinctus. 



5 This tribe has been added to that proposed by Hartig, because the species de- 

 scribed below seemed to render it necessary. 



6 Taxonus dubitatus (n. sp.) § J". (Length 0.24-26 in., Ex. 0.48-52 In.) 



?. Honey-yellow, head and metathorax black; antennae slender, black, third 

 and fourth joints of equal length ; a basin beneath base of each of antennae, and 

 above these, side by side, three others, springing from each of ocelli ; clypeus 

 slightly emarginate, labrum retracted, both white ; mandibles and palpi yellow- 

 ish ; scutel, metathorax, and basal plates blackish ; posterior tibiae, except at 

 base and tips of all the tarsi above, blackish ; wings hyaline, edges of stigma 

 and the costa black. 



(^. The male has the apex of fiagellum pale beneath ; upper half of pleura, 

 apical half of abdomen, and the sides of the basal half above, black ; coxae and 

 trochanters almost white ; posterior tibiae like the others, with only the apical 

 joints of tarsi and the nails black. 



Eleven specimens. Conn., Mass., F. G. Sanborn. Hoboken, N. J., C. F. Jung. 



The thorax is narrow and body long and slender like Taxonus rufipes of 

 Europe. 



