434 HYMENOPTERA. 



the third, the latter a little shorter than the fourth ; the remaining joints very closely 

 united. Head sparsely covered with a white pubescence; the face coarsely, trans- 

 versely, rugosely punctured, and with a A-shaped (not very clearly separated) 

 raised part in the centre ; the cheeks more closely and much less strongly punctured ; 

 front and vertex shining, sparsely covered with shallow, moderately large punctures ; 

 the vertex raised in the centre ; the eyes slightly diverging and clearly margined. 

 Thorax above bearing separated punctures like those upon the head ; the metanotum 

 more closely punctured, shining; pleurae punctured, the punctures running into 

 reticulations ; the sutures striated and shining ; the lower part of the mesopleura 

 shining and impunctate. Petiole shining, longitudinally striolated above. Legs stout, 

 the hind tibiae and tarsi densely covered with a whitish (not bristly) pile. The meta- 

 tarsus is as long as the following three joints united; the spurs pale, the longer one 

 reaching to the middle of the metatarsus. All the knees are pale ; the four anterior 

 tibiae and tarsi are pale reddish-testaceous. The scape beneath is pale reddish ; the 

 mandibles are red, black at the tips. 



E. guatemalensis is separated from the other species of this group from our region 

 by the thorax not being rugosely punctured. 



Fam. TRIGONALID-E. 



A remarkable family, containing comparatively few species, but having a wide range 

 over the globe. By some authors its only genus is placed among the Evaniidae ; but it 

 does not appear to me to have a very near relationship with Evania. 



TEIGONALYS. 



Trigonalys, Westwood, Proc. Zool. Soc. 1835, p. 52. 



Lycogaster, Shuckard, ElommU of Di - it . Ent. p. 12| {1889) . ^T 4 // 



Seminota, Spinola in Guerin's Mag. Zool. 1840, Ins. t. 41. p. 1. 



1. Trigonalys mexicana. 



Trigonalys mewicanus, Cresson, Trans. Am. Ent. Soc. vii., Monthly Proc. Ent. Section, p. vii ((J) 1 . 

 Bab. Mexico (Sumichrast x ). 



2. Trigonalys laeviceps. 



Trigonalys leeviceps, Cresson, Trans. Am. Ent. Soc. vii., Monthly Proc. Ent. Section, p. vii ( ? )\ 

 Bab. Mexico (Sumichrast 1 ). 



3. Trigonalys ornata. 



Trigonalys ornata, F. Smith, Journ. Ent. i. p. 83 1 ; Westw. Thes. Ent. Oxon. p. 123, t. 23. fig. 7\ 

 Bah. Mexico 1 2 . 



