138 THE CANADIAN ENTOMOLOGIST. 



much longer than the body. Pronotum large and posteriorly considerably 

 produced over the base of the abdomen, lateral lobes well developed, but 

 not so deep as long, nearly vertical, the posterior margin distinctly 

 sinuous ; lateral and median carinae wholly absent except posteriorly, 

 where the median carina is very indistinctly present ; anterior margin 

 truncate, posterior margin rounded. Prosternal spines moderate. Organs 

 of flight wholly concealed. Legs long and stout ; anterior tibire armed 

 above on the outer margin with three spines, except on the right leg, 

 where there are four, the inner margin armed with two spines ;* posterior 

 femora more than twice as long as the pronotum, and much swollen on 

 the basal two thirds, armed beneath along the middle of the inner carina 

 with several small black teeth. Plantulae of the posterior 

 tarsi short, scarcely half as long as the basal segment of 

 the tarsus. iVbdomen large and plump; cerci (fig. 7) about 

 three times as long as broad, very slightly curved inwardly, 

 the shaft nearly cylindrical, apically somewhat flattened, 

 and near the tip w^ith a large triangular tooth, the tooth 

 larger and longer than the apical portion of the cercus and 

 of similar shape, giving the general appearance of the 

 m/fch^ih; cercus ccrcus bcuig forked, as shown by the accompanymg 

 figure. Last abdominal segment notched, the angles no 

 longer than broad. 



General colour green, with pronotum dorsally marked with fuscous 

 posteiiorly ; the lateral lobes are narrowly bordered with black posteriorly. 

 Measurements. — Length of pronotum, 12 mm.: posterior femora, 26 

 mm.: cerci, 2 mm. 



Type.— (Cat. U. S. Nat. Mtis,, No. 13444); Hondo, Texas, March 

 30, 1908, eating petals of Opuntia flowers. (J. I). Mitchell, collector.) 



BOOK NOTICES. 



DiPTERA Danica. — Genera and species of flies hitherto found in Denmark. 

 Part III, Empididi^. By William Lundbeck ; 335 pp > 141 figs. 

 (Copenhagen, G. E. C. Gad ; London, Wm. Wesley & Son.) Nov., 

 1910; $3.25. 



Although among the 164 species of Empididae described in the 

 [present volume there are not many which are also found in North 

 America, no student of this Order can afl"ord to be without this valuable 



*Probably variable, as in haldenianii. 



