178 BULLETIN 15, UNITED STATES NATIONAL MUSEUM. 



(Icsciibetl for tlu' first time. A single S specimen (toj^ether with sevenil 

 females) was reaied from si>i(ler eggs in an orange-colored eocooti by 

 Mr. J. H. P^mertou, in 1871, and is now in the Department of Agricul- 

 ture. This single specimen has enabled me to i)erfect the diagnosis 

 of the genus. It bears a close resemblance to the male in the genus 

 Acohndes, but differs in having subclavate antenuic, a little longer 

 marginal vein, longer stigraal vein, and a distinct basal nervure. 



The habits of the genus were unknown to the European authorities, 

 and we are indebted to an American, Mr. L. (). Howard, for first making 

 us acquainte<l with them in this country. All that have been reared 

 are from s])ider «'ggs. 



The species known to me may be tabulated as follows: 



TAHLK (»F Sl'EClEy. 



15<Mly not tilt iiely hl.uk 2. 



Uo<ly iMitiifly l)l;ick. 

 Head anil (Innax faintly niicroscnpioally piinctiilau*; iilxlonuni sniootli, sliininf^. 



L«'g8 and antenna- fnscons li. .Aiixmiis, sp. uov. 



Li'gs, Hcape and funiele. brownish-j^ellow B. xioek, 8]). nov. 



2. Head black. 



Thorax and abdomen t'liscons oi' pieeons ; legs and antenuie, biownisli-yellow, the 



seajte and pedicel at base, fuscons B. PicEUS, sp. nov. 



Thorax and abdomen brownish-yellow; legs and antenna' yellow, the clnb 



black B. ci-AVATis, Prov. 



Wholly dark houey-ycUow B. amkricancs. How. 



Baeus ininutus, sp. nov. 



9 . Length, O.o""". Black, shining, faintly microscopically puiu'tu- 

 late, with a micro.>copic sericeous pubesceni'c; antennae and legs fus- 

 cous, or dark 1> >wn, the tarsi paler. Antenn.e T-.joiuted, very .short, 

 the club largi^, l)ointed-ovate; pedic<'l large, pale at tip; first funidar 

 Joint scarcely longer than thick; the remaining joints of funiele very 

 minute, transverse. Abdomen broadly oval, convex, shining, impunc- 

 tatc, wider than the head and as long as the heatl and thorax united. 



Habitat. — Ottawa, Canada. 



Types in Coll. Ashmead. 



Described from 2 9 specimens received from W. Hague Harrington. 

 * Baeus niger, hj>. nov. 



9 . Length, 0.7""". Black, shining, with a fine sericeous pubes- 

 cence; head impunctate; eyes very large, nearly round, occui)ying the 

 whole sitle of the head, i)ubescent; thorax not longer than the length 

 of the head, microscopically punctate. Antenna' very short, the scape 

 and funiele pale rufous or brownish-yellow, the club large, black. JiCgs 

 bro\vuisU yellow, the tibite with u sli^fht dusky streak ut tUe middle, 



