98 IIYMENOPTERA ACULEATA. 



with a perpendicular crenature in front, from wliicli are 

 emitted posteriorly two horizontal ones, propodeum elon- 

 gate, clathrate ; abdomen sliining, finely and rather closely 

 punctured. 



L. 6-7 mm. 



On flowers of Ruhus, &c. London District; (Smith), 

 Colchester ; {Hanuood). Eugby ; (Morice). Exeter ; [Par- 

 ftl). Norfolk; {Bridgman). Hastings. Gloucester; {V. R. 

 Perkins^). 



P. iusignis, V. d. Lind. {corniger ^ nee ? , Shuck, and 

 Smith). — Smaller and less elongate than the preceding ; 

 mesonotum more rugosely punctured, the anterior impres- 

 sions longer, strongly crenate, especially in the ($, and the 

 posterior margin of the mesonotum also slightly crenate 

 in the ? , strongly in the cj ; the tubercles are black or pale 

 in the (J, pale in the ? ; mandibles in the ^ often black ; in 

 the ? there is a slight tubercular spine between the antonnaa. 



L. 5-6 mm. 



Widely distributed and not rare, but not recorded from 

 Scotland or Ireland. 



P. gracilis, Curt. — This species may be at once known 

 from either of the preceding by the single transverse cren- 

 ature of the mesopleurse. The tubercles and labrura are 

 black in both sexes, the mesonotum is punctured like that of 

 corniger, although not quite so finely, the anterior im- 

 pressions are very short and inconspicuous, and there is 

 no crenulation on the posterior margin of the mesonotum 

 as in insignis. 



L. 6-7 mm. 



Not rare, and widely distributed. Mr. G. C. Bignell has 

 bred it from the stump of an old apple-tree. 



p. monilicornis, Bldh. — Distinctly larger and with a 

 wider mesothovax than gracilis, labrura, mandibles, scape 

 of the antennaa in front and tubercles pale in both sexes; 

 niesopleuTse with only one transverse crenature, although 

 in the (^ there is a second simple transverse impression; in 



