39i 



wings hyaline iridescent, infuscate apically ; venation brownish. Face 

 and occiput and apices of tergites with some appressed silvery pubes- 

 cence, with some less conspicuous fine similar short hairs elsewhere 

 generally. 



Anterior margin of middle lobe feeblj- rounded out, impressed in 

 the middle and slightly emarginate, the disk convex ; front with a 

 short, faintly impressed median line nearly midway between the an- 

 tennal sockets -md the anterior ocellus. Eyes rather strongly converg- 

 ent above, ocelli in an acute triangle, the hind ocelli distinctly nearer 

 the eye margin than to each other and nearer each other than to the 

 occipital margin, three times the width of an ocellus in front of the 

 summit of the eyes. 



Front, vertex, pronotum, mesonotum. mesopleura, scutellum and 

 ■ metanotum appearing finely granular under a hand lens, really very 

 closely minutely punctulate, propodeum very finely transversely obli- 

 quely striolate, the longitudinal raised line obscure, placed in a shallow 

 groove, the sides obliquely longitudinally striolate, the posterior face 

 with a triangular fovea above, with short transverse ridges on either 

 side similar to those in aciicscciis but more numerous ; abdomen tes- 

 sellate. 



Anterior tibiae with a comb composed of a few elongate setae ; 

 posterior and middle tibiae with a few spines. Sternites 2-5 with a 

 few erect black setae on the margins. 



Nervulus interstitial with the basal nervure. First joint of flagel- 

 lum a little longer than second. 



Described from two females collected at Idylwild, Mt. 

 San Jacinto, California, July, 1912, the type collected by 

 P. H. Timberlake for whom the species is named, and the 

 other by the writer. 



Typ(> in the author's collection. 



Two other species are described as having the abdomen 

 more or less ferruginous. //. arenanmi Cockerell is a smaller 

 species (3 mm.), the tibiae are red and the longitudinal raised 

 line of the propodeum is distinct. //. texanus (Ashmead) has 

 the legs entirely red, the petiole of the 2nd cubital cell is de- 

 scribed as only a third as long as the side of the cell while in 

 ihnberlakei it is more than half as long. Texanus is a small- 

 fr species (3 mm.) and the propodeal raised longitudinal line 

 is distinct, the collar is said to be brownish ferruginous and 

 the tM'o or three apical segments are said to be dark. These 

 differences may be inconstant, since in the tAvo individuals of 



