* 



58 HYMENOPTEEA. 



ACORDULECERA. 



Acordulecera, Say, Bost. Joura. i. 1835, p. 209. 



l. Acordulecera dorsalis. 



Acordulecera dorsalis, Say, Bost. Journ. i. 1835, p. 210; Norton, Trans. Amer. Ent. Soc. i. p. 49; 

 Cat. p. 19 (rffe?) 1 - 

 Edb. Noeth Ameeica. — Mexico \ 



The genus Acordulecera does not apparently, judging from the description, differ 

 materially from Perantherioc. If this view be found correct, the latter name must be 

 dropped. 



PERANTHERIX. 



Perantherix, Westwood, Thesaurus Entomologicus Oxoniensis, p. 107. 



Only two species of this genus have been described, and both are from Brazil. The 

 genus is very closely allied to Loboceras, but is readily known from it by the antennae 

 having one joint less, only three cubital cellules, and by the second and third pair of 

 tibiae being provided with spines, while only the middle pair has them with Loboceras. 

 The trophi are formed as in the last-named genus. The structure of the inner lobe of 

 the maxilla is quite different from any thing I have seen in any other genus of .the 

 Tenthredinidse. It is reticulated in a peculiar manner, and the form of the reticulation 

 is different in the palpi of the two species I have examined. (See figures.) 



1. Perantherix westwoodii. (Tab. III. figg. 12, $ ; 12 a, mandible; 12*, an- 

 tenna; 12c, labrum; 12 d, maxilla; 12c, head; 12/, top of maxilla, highly magnified.) 



Lutea, antennas, €apite, mesonoto, tibiarum apice tarsisque nigris ; alis navo-hyalinis, fascia substigmaticaii 



fumato, stigmate nigro, basi costaque flavis. <S $ •• 

 Long. 6 millim. 



Hab. Panama, Bugaba 800 to 1500 feet {Champion). 



The two basal joints of the antennae are subequal, not much longer than broad, 

 thicker than the other joints ; third joint' a little longer and thinner than the fourth, 

 which is a little longer than the fifth ; sixth longer than the fifth, thin and sharply conical 

 at the apex ; all the joints are thinner at the base than at the apex, and covered with long 

 setae, which are longest at the apex of the joints. On the head the frontal furrows are 

 very flat, the frontal one is not defined, but there is a large round fovea above the 

 antennae ; the labrum, clypeus, and mandibles are yellow. The mesonotum is punc- 

 tured, black, except the scutellum ; the middle lobe reaches to the tegulse ; the furrows 

 shallow ; there is no furrow in the centre. The calcaria are short and thick ; the 

 tarsi are a little longer than the tibiae. 



