MON0G14AP1I OF THE NORTH AMKHICAN PKOCTOTiiYFID.E. 175 



AcoluB Zabriskiei, sp. nov. 

 (IM. xv.Fig.T. ,?.) 



i. Leiijftb, 1""". Black, polished, fluely seiicoous; iiuindibles red- 

 dish; scjiiK! honey-yellow ; tlagelluni pale brown ; legs, including: coxse, 

 reddish-yeUow. Head very large and broad, a little more than three 

 times as wide as thick antero-posteriorly, an<l mncli wider than the 

 thorax, the space between the eyes alone fnlly as wide as the thorax; 

 occiput concave, with the superior margin sharp; eyes broadly oval, 

 convex, bare; ocelli triangularly arranged, the laterals sitinited in th»' 

 posterior angle of tiie vertex, close to the eye. Antenna' 12-jointed, 

 filiform; the scape clavate, about one-third as long as the Hagellnm; 

 pedicel cyathiform, longer than any of the funiclar joints : funi<'lar Joints 

 all short, scarcely, if at all, longer than thick, pubescent. Thorax short, 

 ovate, rounded before, narrowed and truncate behind, the collar not 

 visilde from above; mesonotum a little broader than long, without fur 

 rows; scutellum c(mvcxly elevate<l posteriorly, margined, or with a deli- 

 cate rim, laterally; metathorax short, with short stria; above. Wings 

 hyaliiu', with long cilia, a basal nervure, a short marginal and a short 

 stigmal vein ending in a small rounded stigma, the stigmal vein thick- 

 ened at base. 



Abdomen oval, narrowed and truncate at base, r<mnded and br<»a<l- 

 ened posteriorly, the first two segments transversely linear, the third 

 very large, occupying most of its surface, the fourth about as long as 

 the tirst two united, the following exceedingly short, scarcely visible, 

 except as transverse lines. 



Habitat. — Flatbush, Long Island. 



Types, two S siKJcimens. in National Museum. 



Bred October 4, 181)2, by Kev. J. L. Zabriskie, from the nest of an 

 uukn«>wn spider. 



CERATOBiEUS Asliin.. j^eu. uuv. 



(Typt' ('. GDi-HtidiH Ashni.) 



Head very large and broad, nuich broader than the thorax, tlie oc- 

 ciput margined; ocelli ."> in a triangle, wide apart, the lateral touching 

 the eye; eyes br<>adly oval. 



Antenna' inserted at the base of the clypeus, in 9 sliort, clavate, 

 7-jointe<l, the dub very large, inarticulate: f, unknown. 



Maxillary pali)i ( ?) ;{-,j<nnted; labial palpi 2-jointed. 



Mandibles bitid. 



Thorax oval, the prothorax not visible from above; mesonotu.n with- 

 out furrows, or with but a slight trace of them posteriorly; scutellum 

 semicircular; nietathorax very short, abiupt. 



l"'ront wings, when present, with a distinct but shoit marginal vein, 

 an oblique stigmal, and no pos*^ marginal, tlie stigmal vein t<'rmimit 

 ing in a slight knob. 



Abdomen t)val, or pointed-«>vate, depressed, subsessile, composed m[ 



