TKYPOXYLON.— LAEKA. 49 



of the third and fourth antennal joints united. Eye-incision widening out broadly, so 

 that its mouth is more than twice the width of the base. Clypeus, face, the head 

 behind the eyes, and eye-incisions densely covered with silvery pubescence. Clypeus 

 slightly projecting, the apex rounded. Pro- and mesothorax sparsely and finely 

 punctured ; the mesopleurae shining, im punctate. Metanotum obscurely obliquely 

 striated, the centre raised into a U-form, but with a hollow in the middle; the middle 

 segment with a sharply oblique slope and furrowed in the centre. The pronotum rises 

 gradually to a point in the centre. The entire thorax is pubescent ; the mesonotum 

 in front, the mesopleurae at the base and apex, and the metapleurae and sides of the 

 metanotum are thickly covered with silvery hair. Abdomen nearly twice the length of 

 the head and thorax united ; the segments not tumid at the apex ; the second segment 

 about one fourth longer than the third, pruinose ; the apical segments covered with a 

 moderately long pubescence. Legs thickly pruinose; the coxae covered with white 

 hair. 



LARKA. 



Larra, Fabricius, Ent. Syst. ii. p. 220 (1793); Kohl, Verh. zool.-bot. Ges. Wien, 1884, p. 65. 

 Larrada, Smith, Cat. Hymen. Ins. iv. p. 273 (1856); Patton, Proc. Bost. Soc. Nat. Hist. xx. 

 p. 385 (partim). 



I use here the term Larra as defined by Kohl (loc. cit.). Larra and Notogonia are 

 united by Smith, Patton, and others in L/arrada ; but I agree with Kohl in regarding 

 them as distinct. L/arra, in fact, may be known from Notogonia by the form of the 

 prothorax, the mandibles without an inner tooth, the smooth pygidium (not thickly 

 pilose and ending in bristles), the smooth, shining abdomen, the fore tibiae spined on 

 the outer side, and the absence of a process in the third ventral segment ; and, further, 

 by the eyes not converging so much at the top, and the shorter clypeus and legs. 



Larra has a wide distribution over the globe. 



^ l. Larra godmani. (Tab. IV. fig. 10, $ .) 



Nigra, nitida, capite thoraceque punctatis ; metathorace opaco, rugoso ; abdomine rufo ; alis fuliginosis. $ . 

 Long. 16-17 millim. 



Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman, Dec. 1887). 



Antennae with the scape bare, shining ; flagellum opaque, covered with a white 

 microscopic down ; the second joint one half the length of the third, the latter about 

 one quarter longer than the fourth. Head shining, microscopically pilose, the cheeks 

 covered with short, white pubescence ; punctured distinctly, the punctures clearly 

 separated. Eyes margined at the top, separated by rather more than the length of the 

 third antennal joint. Above the ocelli is a wide semicircular depression ; and there is 

 a wider one, narrowed in the centre, towards the lower ocellus, the latter being rather 

 indistinct and placed in the middle of the depression ; from this depression a narrow, 



biol. CENTR.-AMEE., Hymenopt, Vol. II., March 1889. hh 





