BEES IN BRITISH MUSEUM. 331 



very short and pointed. Both species have simple mandibles, those 

 of conspicuus are angled within. The tongue is broken in the speci- 

 men of micrelephas, but in conspicuus it is only moderate, little ex- 

 ceeding the labial palpi. P. micrelephas has the scutellum strongly 

 bituberculate, in conspicuus it is at most slightly depre-sed in the 

 middle. The venation of micrelephas is nearly that of Habropoda ; 

 both r. ns. meet the t. cs. The clypeus of micrelephas is strongly 

 produced, triangular in lateral view, with the semicircular receding 

 lower half sparsely punctured. In P. conspicuus the clypeus is 

 merely gently convex. 



In view of the numerous differences observed, P. conspicuus may 

 be taken as the type of a new subgenus (or genus ?) Pachymelopsis. 



A NT HOP II OR A Latr. 

 Antliophora solifaria Bits, {insularis Sm.), £. 



Hair of scutellum black ; hair on inner side of basal joint of hind 

 tarsi and brush on apex of outer side splendid red golden, the other 

 hairs on outer side more or less of the same color. 

 Authophora marginal a Sm. 



The 9 in my New Mexico tables runs to A. cleomis Ckll. ; the 



% has the pubescence like the 9 > and the clypeus white, broadly 



margined at sides with black, as in cleomis. The legs are folded up 



and hard to see, so I cannot tell whether they agree with cleomis; 



but if the two species are different, they are at any rate extremely 



close. Another male placed with marginata evidently represents 



a different species; it has ochreous hair on the thorax, not mixed 



with black. 



THAIM.4TOSOMA Smith. 



Tliauiiiatosoma riuboulayi Sm. (T.). 



Swan River, Australia. Flagellum thread like, with the last 

 joint and the apical half of the one before it forming together a flat 

 black disc; antenna? very long ; maxillary palpi apparently 2-jointed 

 (possibly 3-jointed), with a thick basal and a narrow apical joint; 

 two submarginal cells, the second very long and receiving both re- 

 current nervures, one near its base, the other near its apex ; b. n. 

 falling short of t. m. ; apex of abdomen with a short spine on each 

 side; first ventral segment with a large prominence; first dorsal 

 abd. s. deeply excavated at base, the excavation with a sharp mar 

 gin ; a deep constriction between first and second dorsal segments. 



TRANS. AM. ENT. SOC. XXXI. SEPTEMBER. 1905. 



