CHALCID FLIES OF GENUS PERILAMPUS — SMULYAN 407 



a stripe above, the middle and- posterior pairs sometimes darker 

 above, at least basally; tarsi testaceous or reddish; wings hyaline, 

 veins testaceous to dark brown. 



Male. — Length about 1.75-2.75 mm. Similar to female; portion of 

 scape bearing sensorial punctures slightly broadened to quite broad 

 apically and occupying slightly more than one-tliird to about one-half 

 of scape, sensoria fine to moderately coarse. 



T?/2?e.— U.S.N. M. no. 18303. 



Redescribed from 71 females and 38 males, including the type and 

 3 female paratypes. Nearly all the above material is in the United 

 States National Museum. This is evidently a western species. 



Distribution. — North Dakota (July, Aug. "taken from sunflowers"); 

 Nebraska (June); Kansas (July); Texas (Feb. to Oct., inclusive and 

 ?Dec.; taken in April "on Lepidium", in June "from Sjphaeralcia 

 angustifolia" , and in September "on Amorjjha fruticosa") ; Colorado 

 (May, Aug.); New Mexico (April "on Sisymbrium", June, Sept. "on 

 Bigelovia"); Idaho (June, July); Arizona; Oregon (June, Aug.); 

 California. 



The species has been reared in association with Acrobasis sp., but 

 very hkely as a hyperparasite. One specimen is labeled "on Eulophus, 

 Dallas, Texas, 9-V-'06, F. C. Bishopp coll." 



PERILAMPUS MUESEBECKI, new species 



Female.- — Length about 1.5-2.75 mm. Head: Frons without a 

 carina, meeting vertex in more or less of a curve; emargination of 

 fronto vertex apparently never very pronounced; front and face 

 smooth except for hair punctures; hyperclj^peal area usually as long 

 as or about as long as clypeus; cheeks straight or nearly straight; 

 head in front view more or less elongate or slightly transverse and as. 

 a rule sub triangular; eyes not reaching level of base of clypeus. 



Thorax: Area along inner margin of parapsides smooth or practi- 

 cally smooth; umbilicate punctures on mesoscutum and scutellum 

 angulated and interspaces thin, mere septa; anterior edge of pronotum 

 at lateral angles not depressed, the punctate portion of pronotopre- 

 pectal area dorsally long, occupjdng half or more than half of distance- 

 between anterior edge of pronotum and the tegula of wing; axilla 

 with a triangular or roughly triangular extension about as wide as or 

 wider than long on side of scutellum, the base extending about to 

 middle or above middle of axilla, face of axilla sloping more or less 

 toward base of extension and not depressed or excavated above base 

 of extension; basal shallow furrows on underside of apex of scutellum 

 turning caudad medially and meeting or nearly meeting on the 

 median line to form an acute or subacute angle; neck of propodeum 

 coarsely sculptured, very rarely with weak sculpture; wing hairs short 

 and usually dark but sometimes in large part pale; postmarginal vein 



