188 * DIPTEEA. 



reflection. The Panama insect has "three" teeth on the hind femora, while in other 

 specimens the number is more often " two" than three. I would not on such slight 

 characters introduce a new species. 



There are two other described species from our region, both from Mexico : — 

 Lampria circumdata, Bellardi, Saggio &c. ii. p. 15, t. 1. f. 17. 



mexicana, Macq. Dipt. Exot. Suppl. ii. p. 37 ; Bellardi, 1. c. p. 13. — 



Cordova. (I have seen the specimen of this in Prof. Bellardi's 

 collection ; it has no spines on the femora.) 



ANDRENOSOMA. 



Andrenosoma, Rondani, Dipt. Ital. Prodr. i. p. 160 (1856). 



1. Andrenosoma formidolosa. 



Laphria formidolosa, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 280 1 ; Bellardi, Saggio &c. ii. 

 p. 17, t. 1. f. 18 2 . 

 Hob. Mexico 1 (SalU 2 ), Cordova (de Saussure 2 , Edge); Guatemala, Paso Antonio 

 400 feet (Champion) ; Nicaeagua, Chontales (Janson) ; Panama, Bugaba 800 to 1500 feet 

 ( Champion). 



Two males from Chontales have the underside of the abdomen red ; I take them 

 nevertheless to belong to this species. 



2. Andrenosoma cincta. 



Laphria cincta, Bellardi, Saggio &c. ii. p. 18, t. 1. f. 19*. 



Edb. Mexico (Salle x ) ; Beitish Hondtjeas, Belize (Blancaneaux). 



I have seen the types in Turin. In L. cincta not only is the margin of the sixth 

 segment red, but the whole of the seventh segment also ; the male genitals black, 

 sometimes reddish at the base; the three basal segments of the abdomen often 

 chestnut-brown. 



3. Andrenosoma cinerea. 



Lampria cinerea, Bellardi, Saggio &c. ii. p. 16, t. 1. f. 16 \ 

 Hal. Mexico x (SalU) ; Panama, Bugaba (Champion). 



I have a single male from Bugaba. Judging from the description of A. pyrrhacra, 

 Wiedem., the red in that species begins with the margin of the fifth segment, while in 

 A. cinerea the fifth segment and the extreme base of the sixth also are black. I have 

 seen the type in Turin. Although the first posterior cell is open, I think this species 

 better placed in Andrenosoma than in Lampria. 



