i\rr. K. E. Turner o)i Fossorial Hymenoiiteru. 301 



the whole apical margiu, the angles only slightly produced, 

 a narrow transverse depression on the middle of the clypeus, 

 the apical half slij^htly porrect. Mandibles bidentate, the 

 outer tooth acute, the inner very broadly truncate. Antennae 

 as long as the head, thorax, and median segment combined, 

 the apical joints slightly arcuate. Head and thorax finely 

 and closely punctured, abdomen more sparsely punctured 

 and shining. Median segment as long as the breadth at the 

 base. Abclomen rather slender; the first segment gradually 

 broadened from the base ; seventh dorsal segment narrowly 

 truncate at the apex, the lateral margins raised ; iiypo- 

 pygium short and narrow, rounded at the apex. Third 

 abscissa of the radius a little longer than the second, the 

 second recurrent nervnre received at one-third from the base 

 of the third cubital cell. 



Black; the mandibles (except at the apex), clypeus 

 (except the depressed line on the middle), the frontal pro- 

 minences above the antennse, the margins of the eyes very 

 narrowly (except at the summit), a line on each side on the 

 j)osterior margin of the head, the margins of the pronotum, 

 a small spot on the tegnlse, a small spot on the mesopleurse, 

 a large spot on the scutellum and a small one at each of the 

 anterior angles, a line on the postscutellum, a broad longi- 

 tudinal band on each side on the median segment, a large 

 spot on each side on dorsal abdominal segments 1-4, and a 

 line on the anterior tibiae beneath yellow; anterior tarsi 

 luteous. Wings shaded with fuscous, a little more deeply 

 in the radial cell than elsewhere; nervures fuscous, stigma 

 testaceous. 



Ijength 13 mm. 



Hub. Tucuman, N. Argentina (Stcindach). 



Type in Berlin Museum. 



Near the group of E. maculipennis, Guer., but is a less 

 robust species, the clypeus is more produced and much 

 narrower at the apex, and the difference in colouring is 

 considerable. 



Genus Thynnus. 



The species placed in this genus in my paper on the 

 Thynnidae of the Hungarian jNIuseum (Ann. Mus. Nat. 

 Hung. viii. 1910) were not published in time for inclusion 

 in my revision of the family in Wytsman's ' Genera In- 

 sectorum.' The following changes in the generic names are 

 necessary : — Thynnus [Zeleboria) comj,ar should be placed in 

 Neozeltborla, Rohw. {Zeleboria, Turn.) ; T. {^olothynnvs) 

 exigmis and T. {/Eohjthynmis) lactarius should be included 



