156 Bulletin Wisconsin Xatural Histonj Society. [ Vol. 6, Nos. 3-4. 
The head is strongly contracted heiiind while in caudatus it is 
very faintly so. 
Described from one specimen from Harrisbiirg, Pa., sent me 
by Professor H. A. Surface. I have later seen a second collected 
b} Mr. P. R. Meyers at Enola, Pa., Oct. 3, 1908, under a stone. 
FAMILY SCEUONTD.^:. 
Aphanomerus americanus sp, nov. 
Female. Length 1 mm. Black, the antennae except the club and 
the legs exce]3t the coxae yellow. Head slightly more than twice as 
wide as thick anteroj)Osteriorly, the vertex very sharply rounded above 
and quite acute. Ocelli in a triangle, the lateral ones removed from 
the eye margin by about their own diameter. Antennae 7-jointed. the 
club larg-e and unjointed except for a trace of sutures indicating- four 
club joints ; club as long" or a trifle long^er than the funicle : scape 
stout, thickenerl apically. but little longer than the club ; pedicel as 
long as the first three joints of the funicle taken tog'ether ; first funicle 
joint longer than broad, remaining- ones very short, but becoming 
broader ; club large, ovate. Eyes bare. Surface of head shagi^eened. 
Thorax oval, pronotum visible from above, especially on the sides where 
it is quite broad. jNIesonotum much narrowed anteriorly where it is 
fitted into the posteriorly excavated pronotum ; with complete parap- 
sidal furrows, its surface shagreened and thinly short w^hitish pubes- 
cent. Scutellum shag-reened, rounded behind and provided with a 
marginal line. ^Metathorax very short, with two short, approximated 
strongly raised median carinae near the base, forming a sort of tooth 
when seen in profile. Abdomen as long as the thorax, widest near 
the apex of the second segment ; subsessile, the first segment small, 
finely longitudinally fiuted. Second occupying most of the surface of 
the abdomen, about one-fourth longer then wide and coarsely striated 
along the entire base ; following segments very short. Legs stout, the 
femora strongly thickened, the tibiae however only very slightly cla- 
vate ; tarsal claws about equal. Coxae piceous, remainder of legs yel- 
low. Wings nearly hyaline, with a slight yellowish tinge, veinless 
except for a clavate pale brown submarginal vein well separated from 
the costal margin and reaching two-fifths the length of the wing. 
Described from a large number of specimens bred by Dr. 
George P. Barth from the cocoons of a species of Crahro. Type 
in the collections of the Milwaukee Public Museum. 
This is the first time this genus has been found in America. 
It was first described bA^ Perkins from Queensland, Australia* 
where it is represented by a number of species parasitic on the 
eggs of certain leaf-hoppers. That the present species attacks 
the Crahro directly seems probable, although it may of course be 
a hyperparasite. That it can be an egg-parasite however, appears 
to be extremely unlikely. 
* Bull. Hawaiian Sug-ar Planters' Expt. Sta.. No. 1. part 6, p. 200 (1905). 
