34 HYMENOPTERA ACULEATA. 



antenrife and legs paler. Head very small, rugose, at 

 a much lower level than the very elevated mesonotum, 

 third joint of the antennae as long as the next three 

 together; thorax very convex in front, above dull, irregu- 

 larly strigose, clothed with pale hairs, wings with pale 

 nervures ; abdomen with the nodes of the petiole dull and 

 hairy, posterior segments shining. 



? coloured like the $ and clothed with scattered hairs, 

 head scarcely narrower than the thorax, first joint of the 

 flagellum wider and longer than any of the following four, 

 which are about sub-equal ; mesonotum shining, finely 

 strigose at the sides and posteriorly, scutellum strigose 

 longitudinally, propodeum transversely rugose, with two 

 strong spines ; abdomen with the petiole dull, its posterior 

 segments bright and shining. 



^ pitchy-brown, clothed with hairs as in the ^ and ? , 

 head large, longitudinally rugose; thorax very wide in front, 

 and truncate, its anterior angles distinct, sui'face longitu- 

 dinally rugose, propodeum with two strong spines ; abdomen 

 with the petiole slightly shining, its first joint much raised 

 posteriorly and hardly longer than high at the apex, 

 posterior segments shining. 



L. $ 6-7 mm., ? 7-8 mm., ? 2-4 mm. 



Very common in some localities, especially on sandy sea- 

 coasts ; swarms in August. 



Two exotic species of this genus occur in hothouses in 

 this country. T. Guineense Fab. (Kollari Sm.), and T. 

 simillimum Sm. ; the latter is a much smaller, paler species 

 than caespitum, the former is more brightly coloured, and 

 has the surface of the head and thorax reticulately rugose. 



STENAMMA, Westw. 



{Asemorlioptrum, ]\latjr.) 

 S , ? and 5 nearly equal in size. 

 cJ and ? winged, $ apterous, c? antennas thirteen- 



