INSECUTOR INSCITI^ MENSTRUUS 125 



explains its rareness in the East. Salt marsh pools, it may be 

 noted, are not forested and hence the occasional occurrence of 

 the species on the Atlantic seaboard. The species has as 

 many generations in the year as the conditions warrant, al- 

 though probably only part of the eggs hatch at each successive 

 wetting. Dyar demonstrated this in Nevada, where he ob- 

 tained as many as three sets of larvae from one deposition of 

 eggs. 



In regard to the European dorsalis, since there is but one 

 species in America, there is probably but one in Europe, and 

 dorsalis and curriei may properly be compared. As regards 

 coloration, no differences appear. Unfortunately, we do not 

 know the larva of dorsalis^. The male genitalia are very simi- 

 lar to those of curriei; but we have only a single mount of 

 dorsalis. In that, the two spines of the basal lobe of the side- 

 piece seem more approximate than in curriei. We do not de- 

 tect any other difference ; but on account of the paucity of our 

 information about dorsalis, we must leave the question of the 

 exact relation existing between the American and European 

 forms for the present undecided. 



A NEW ORTALID FROM THE PHILIPPINES 



{Diptera, Ortalidce) 

 By FREDERICK KNAB 



The following new species was reared in the course of in- 

 vestigations by the Philippine Bureau of Agriculture and 

 transmitted by the Entomologist, Mr. D. B. Mackie, to the 

 Bureau of Entomology in Washington for determination. It 

 is described herewith, so that the name may become available. 



Plagiostenopterina hendeli, new species 



Female. — Frons dull piceous black, deeply impressed at sides 



^F. W. Edwards (Bull. Ent. Res., vii, 817, 1917) mentions the larva of dorsalis 

 thus: "Antennae conspicuously pale at the base; about 24 scales in the comb of 

 the eighth segment; scales pointed • • • and heavily fringed (of the even 

 type) ; teeth of pecten with two or three serrations near the base, of which the 

 apical one is considerably the largest; gills scarcely half as long aa the anal 

 segment, bluntly pointed." Unfortunately, the head hairs are not mentioned. 



