114 MlSC. PUBLICATION 174, U.S. DEPT. OF AGRICULTURE 



States are much scarcer but are sufficient to indicate that the species 

 is probably present over the greater part of the northern range of 

 the hessian fly. It is apparently absent from the Pacific coast 

 region, and seemingly also from the Kansas, Nebraska, and Okla- 

 homa wheat sections. Although extensive studies of hessian-fly 

 parasites have been made by various field men of the Bureau of 

 Entomology and others in California, Oregon, and Washington, as 

 well as in Kansas and Oklahoma. C all it via bteolor has never been 

 received for identification from these sections. If present, it could 

 hardly have escaped detection. 



IMPORTANCE 



This species is believed to be of very little importance as a parasite 

 of the hessian fly. Comparatively few specimens have been found 

 in North America, despite the extensive investigations of fly para- 

 sites that have been carried on. 



BUBEKIA FALLAX, new species 



(Fig. 26 ) 



Although having a somewhat different habitus from the genotype, 

 Bubekia tricarinata Ashmead. B. faZlax seems to agree in the impor- 

 tant generic characters and is believed to be correctly placed in that 

 genus. It differs from tricarinata. in having the pronotum shorter, 

 the abdominal petiole shorter, and the abdomen conic-ovate instead 

 of conico-cylindrical as in tricarinata. 



The species may be distinguished from all other parasites of the 

 hessian fly by the median tooth on the clypeus. 



Female. — Length 1.9 to 2 mm. Head a little broader than thorax, fully three 

 times as broad as thick antero-posteriorly at the middle, very slightly convex 

 in front and weakly concave behind, the temples narrow and poorly defined ; 

 ocelli in a low triangle, the postocellar line very nearly twice as long as ocell- 

 ocular line, the latter equal to about twice the diameter of an ocellus; head 

 viewed from in front wider than high (approximately 30:25), the cheeks a 

 little rounded in outline : malar space equal to about half the eye height : an- 

 tenna! scrobe shallow ; eyes oval, with sparse inconspicuous dilation : clypeus 

 with a distinct short tooth at apical middle, not distinctly separated from face 

 basally ; mandibles each with four teeth, the teeth subequal and rounded at 

 apex ; maxillary palpi 4- jointed ; whole head finely reticulate, more finely so on 

 face and clypeus, the latter without any striae. Antennae inserted near middle 

 of head, weakly clavate. 13-jointed ; scape cylindrical, attaining front ocellus : 

 pedicel about twice as long as broad, two ring joints strongly transverse, the 

 first a little smaller than the second : funicle 6-jointed. the joints subquadrate, 

 the first often a little longer than broad, the sixth a little broader than long ; 

 club ovate, about equal in length to the three preceding funicle joints and dis- 

 tinctly a little thicker than the last funicle joint, the joints subequal in length ; 

 first and second joints broader than long, third triangular or conical and ter- 

 minating in a short process : funicle and club joints each with a single series 

 of elongate sensoria which extend approximately three fourths the length of 

 the segment and number 12 or more per segment. Thorax with its length 

 to its breadth about in the ratio 40 : 25, reticulate-punctate : prothorax short, 

 the pronotum mostly declivous, narrower than mesonotum. the dorsal portion 

 very short and without a marginal carina anteriorly ; mesonotum about twice as 

 broad as long, the parapsidal grooves complete and sharply though not deeply 

 impressed ; axillae separated by a distance equal to approximately half their 

 basal width ; scutellum as long as mesoscutum. moderately convex, without 

 a cross furrow, the reticulation a little finer than that of mesoscutum ; pro- 

 podeum a little more than half as long as scutellum. with distinct median 

 carina, lateral folds, and spiracular sulci ; the area between lateral folds finely 



