6 SMITHSONIAN MISCELLANEOUS COLLECTIONS \'X)L. 10/ 



more plastic than they are. As a result, a single name has been used 

 to cover a mixture of species, and unjustifiable synonymies have been 

 created. The confusion has been increased by the publication of 

 wrongly labeled figures, and in this respect the Biologia Centrali- 

 Americana is not free from blemish. 



To facilitate identification of species of Hyalodictyon the writer 

 offers camera-lucida drawings made by him from the respective holo- 

 types in the British Museum. It has been found necessary to propose 

 two new species, the types of which have been selected from material 

 listed in the Biologia. 



HYALODICTYON NODIVENA (Walker) 

 Plate i, figures 1-4 

 Dictyophara nodivena Walker, 1858, Insecta Saundersiana, p. 37. 



This is the largest known species in the genus. The proportions of 

 the frons are distinctive and characteristic. The apical areoles in the 

 tegmina are very short, some of them not longer than broad. The 

 swellings on the veins of the membrane in M do not constitute a spe- 

 cific character, although they are perhaps more evident in this species 

 than in any other. 



HYALODICTYON TEAPANUM, new species 



Plate i, figures 5, ii 



Dictyophara nodivena Distant, 1887, Biol. Centr.-Amer., Rhynch. Horn., vol. i, 

 p. 40, pi. 6, fig. 3. 



This species, represented by a fair series, is quite distinct from the 

 preceding. The laterodorsal angles of the frons are less obtuse than in 

 nodivena Walker, the sides of the frons are distinctly more concave, 

 while the intermediate carinae of the frons are relatively more widely 

 separated at the base. The frons of nodivena Walker is actually 

 broader than that of teapanum as well as being broader in relation to 

 the median length {H, nodivena, 2.4 to i; H. teapanum, 2.5 to i). 

 The type of teapanum is the specimen from Bugaba figured in the 

 Biologia as D. nodivena Walker. Among other specimens in the 

 series are some from Teapa. 



HYALODICTYON TRUNCATUM (Walker) 



Plate i, figures 6-10 

 Dictyophara trimcata Walker, 1851, List Horn., vol. 2, p. 316. 



This species is slightly smaller than nodivena (Walker), from 



