148 Bulletin of the Brooklyn Entomological Society Vol. XV 



directed forward ; ocellar triangle not extending beyond middle 

 of f rons ; lunule almost transverse above, of moderate size ; 

 face shining in center, and with a slight median keel which sepa- 

 rates antennae at base ; arista thickened at base, microscopically 

 pubescent ; vibrissal angle not produced ; face receding below ; 

 cheek higher than width of third antennal segment and twice as 

 high as width of parafacial at base of antennae. Thorax with 

 two pairs of dorsocentrals and sometimes a weak third pair; 

 prescutellar acrostichals absent. Fifth abdominal tergite in 

 both sexes not half as long as fourth, in female about as long 

 as the short ovipositor. Mid tibia with two or three posterior 

 setulse. Apical sections of third and fourth wing-veins sub- 

 parallel, their apices about equally distant from wing tip ; inner 

 cross-vein beyond middle of discal. cell ; penultimate section of 

 fourth vein from one fourth to one sixth as long as ultimate 

 and as long as outer cross-vein ; ultimate section of fifth vein 

 over half as long as penultimate. Length, 3.5-4 mm. 



Type, female, and three female paratypes, Muncie, 111., August 

 15, 1917 (Prison and Malloch). Allotype, Lafayette, Ind., June 

 II, 191 5 (J. M. Aldrich). Paratypes, 5 specimens, Lafayette, 

 Ind., June 2, one specimen, same locality, August 7, 4 specimens, 

 same locality, June 10-18, 1915 (J. M. Aldrich) ; one specimen. 

 No. 24401, data missing, but probably from an aquatic collection 

 made in Illinois by Mr. Hart, the accession catalogue of which is 

 missing. 



The larvae mine the stems of Dianthera americana along the 

 margins of streams. 



BOOK NOTES. 



The one thought always with us is that the growing genera- 

 tion of today must fill the ranks of the entomologists of tomorrow. 

 It is in these children that an intelligent love of nature must be 

 fostered. As we have said before, every entomologist at one 

 time or another is asked to suggest something likely to interest 

 children in insects. Dr. Pdith M. Patch needs no introduction 

 to entomologists. Her new book for the youngsters "A Little 

 Gateway to Science " (Atlantic Monthly Press, Boston ; 90 cents) 

 I can recommend for youngsters under ten, for I have tried it on 

 three of mine with great success. Under the guise of fairy tales, 



