A. B. WOLCOTT 73 



Enoclerus liljebladi new species 



Similar in form and general appearanrc to E. iclnirinnoneu^ Fabriciiis, 

 from which it differs as follows: Head entirely red (the manflibles, jjaipi 

 and antennae excepted), more finely and sparsely punctate. Prothorax with 

 disc more finely punctate, the sides less strongly rounded, the subajjical con- 

 striction stronger, the transverse impression much less sinuate. Scutellum 

 subtransverso, obtusely rounded at apex (elongate triangular in ichneuinoyieas). 

 Elytra black at base, basal fourth transversely rugulose and very finely punc- 

 tate (coarsely and deeply punctate in icliiiciimoneiis). Abdomen more punc- 

 tate, intercoxal jjortion of first abdominal segment non-carinute, somewhat 

 tumid near apex. Length, 7.5 to 12 mm. 



With l-lio form and color nearly as in ichneumoneiis, this insect 

 is upon examination found to possess but few characters in 

 connnon with that species. Fifteen specimens have been seen 

 and all agree among themselves in possessing the characters 

 given above. This species also bears some resemblance to 

 muttkowsldi, Init that species is l)roader, more depressed and 

 1he scutellum is orbicular. In lUjchladi the anterior mai-gin of 

 the mesosternum is prominently lo1)ed at middle, its anterior face 

 nearly vertical and almost smooth, the submarginal carinae oli- 

 solescent at middle (this condition pi'oduccd by the coarse 

 strigose sculpture) : in mntikowskii the lobe is feeble, ])road, its 

 anterior face arcuatelj^ descending, the outer margin finely 

 cai'inate: in ichneumonens the loho is broad but rather pro- 

 minent, its anterior face vertical, the lobe with a large, deep, 

 irregularly hexagonal, depressed area, the margin of whicli is 

 strongly carinate; the sulimarginal carinae are strongly devel- 

 oped and confluent with the carinate margin of depressed area 

 near the middle of the sides. Many other differences are ob- 

 serva])le, but the above are amply sufficient to differentiate this 

 particularly interesting species, the discovery of which is due to 

 the assiduous collecting of my life-long friend, Mr. Emil Liljel)lad, 

 by whom it was taken on dead jMue tnn^s. 



Pentwater, Michigan, July 11 to 22, 1920. Holotype, a male 

 (No. 1203); allotype, a female (No. 1204); parntype, a male; 

 paratype, a female, in the collection of the American Entomolog- 

 ical Society. Paratypes are also in the collection of Air. Lilje- 

 blad and that of Dr. Edward A. Chapin, of Washington, D. ('. 



The males average nmch smaller than the females, one veiy 

 large niale attains a length of 10.5 mm. In the mal(» the l.isf 



THANS. AM. KNT. .SOC, XLVIU. 



