728 GEOLOGICAL SURVEY OF THE TERRITORIES. 



L. forensis, Hag. Syii. N. Amer. Neurop., 154, 9. 



Formerly only known by a male from California, in the Berlin Mnseum. 

 (Male and female.) 



L. mturata, Uhler. Hag. Syn. N. Amer. Nenrop., 152, 4. 



Known before from California, Cape San Lucas, and San Diego, and 

 from MexicOj Cordova, Tampico ; a decidedly western species. (One 

 fragment.) 



L.flavida, Hag. Syn. N. Amer. Neurop., 15G, 15. 



Known before from Pecos River, W. Texas. (One fragment.) 



MESOTHEMIS. 



31. simjylicicolUs, Hag. Syn. N. Amer. Nenrop., 170, 1. 



Common tlirongliout from Massachusetts and Illinois to Mexico, 

 Florida, and Cuba. (One female.) 



M. longipennis, Burm. Hag. Syn. N. Amer. Neurop., 173, 7. 

 Common everywhere as the foregoing species. (Male and female.) 



M. corntpta, Hag. Syn. IST. Amer. ISTenrop., 171, 3. 



Known from Illinois, W. Texas, Mexico. (One female.) 



M. composita, uov. sp. 



Milk-white, with a yellowish tinge on the head, front, mouth parts ; 

 three transverse shining black lines behind the eyes; lobe of the pro- 

 thorax small, rounded, yellowish white; thorax yellowish white, a lit- 

 tle bluish; two large not well-defined brown bands on the mesothorax; 

 two oblique blade lines on each side, and a third one between them not 

 depassing the stigma; abdomen thickest at the base, black, each segment 

 with an elongated milk-white spot on each side, and another similar one 

 on the second and third segments; venter covered with a whitish }m)w- 

 der, the second ahd third segments with a large elongated milk-white 

 spot; appendices black, short, cylindrical ; the tubercle between them 

 white; valvar opening with a rounded excision; feet black, femora 

 white behind; wings hyaline, a small yellow spot at the base; ueuration 

 black ; the costa milk-white ; the pterostigma large, oblong, black ; 

 fourteen antecubitales ; two postcubitales ; three series of areoles after 

 tbe triangle; membranula white. 



Long, cori),, 47 mill.; exp. alar, 76 mill. 



The species is related to M. corrupta. (One female.) 



DIPLAX. 



D. assimilata, Hag. Syn. N. Amer. Neurop., 174, 1. 



Known from the northern and middle parts of the United States, 

 (One fragment.) 



J), scotica, Donov. Hag. Syn. N. Amer. IsTeurop., 179, 9. 



Common in Europe, N. Asia, and collected at K. Red River by Mr. 

 Kenuicott. (A few specimens.) 



J), mcina, Hag. Syn. jST. Amer. Neurop., 175, 4. 



Common in the north of the United States. (Several specimens.) 



D., spec. nov. 



Nearly related to D. ruhicundula Say, but different by the genital 

 parts. (Only two males, imperfect.) 



