^-- INSECTA. 



AsTLUs, Linn., — 

 lliis the pi-ol)OScis porrcctcd in front. They inuke a Ijuz.zing noise \Aiiilst flving, and seize Flie.=, 

 TipuLx, Ilumble-bces, ami even lieetles, \vhich (licy suck. Then- larvrc live in tlic eartli, ha\ii)^^ a 

 scaly liead armed with Iwt) moveable liouks, and Ijeint:: tluTC tl■an:^iV)rrned intu I'lqKO, wliicli have 

 liouked teeth on the llmriix', and small nivvs iif s;[)ijics on the iibiioniinal segments. 



A lirst -subdivision, Asilici, Latr., has the head transverse ; the e\cs lateral and wide apart, even in 

 tlie males; tlie proboscis at least as long as the head, and our eumplete cell, of an elongated trian- 

 gul.ir fiirm, near the inner inar^nn of the wing, and terminating at the hind niai'gin. The epistoine 

 is always bearded. 



Some of these (with two pulvilli, nnd two unLTUes at the tips of tiie tarsi) have tlie anre!in;ij scarcely loi];X'"'r than 

 the licatl ; the style scarcely distinct, or very .sliort. 



Laphria, Rleig"., has the style not at all, or scarcely visihlo, ami tin.' jiroboscis straif^ht. [Numerous handsome 

 exotic species.] 



Ancilorhynchus, Latr., 1ms the style scareely e.\sert['d, and pointed, find the probosc-is like a compressed, curved 

 and hooked beak. 



Da-fi/pogoir, has the style distinct and Cfuiicil. and (be proboscis stiai^-'Iit. 



In the two next siibj;enera the antennae are evidently lonu^er than the hciul. 



Ct'i'oiurpiis, AVied., has the antennas not arisin;^ on a peduncle. 



Dfocfrja, I\Ieig'., has them inserted on a coninion peduncle. 



In others, the style at the tip of the antenna' is prolonged like a seta, 



..^ivVwi' proper, has the style simple. The siiecies are \'ery numerous. A. i-mhronifonnis |tbe lar2;est Brifish 

 species], is not unconnnun at the end of summer in sandy places. TIk; trnnsforrnatious of J. forcipnlns have 

 been observed. 



Cyrfoma, JMeig-., dillers from all the rest in bavin;:: 2-jointed antennjc, tlir palpi restinL,'' on the ]iroboscis, (be 

 conic-elong'ate form of the last joint of the antenna*, and the smallness of ifje paljii, 



III inn I'm. s^ I'li^'-i diltVrs from all the foregoing in having; the styh; of the antennae plumose. 



('•nmij'iis, Latr. (L'/pfni/'is/cr, Meig.), has three ungues at the tips of the tarsi, the middle one replacing the t\\o 

 pulvilli. 



The second snlidivisiDii, IIvBOTrxi, Latr., has tlie bead rounder, nearly oecnpied by the eyes in the 

 males, with the clypcus rarely bearded ; the iiroboscis is ■very short; tlie wings liavc fewer nerves ihan 

 the precediug insects, and their inner porrlou docs not exhibit the comjilete triangular cell, or it is 

 only rudimentah 



(Ednlea, i\Ieig\, has the last Joint of the antenna- large, elongate-fusiform, and terminated by a very 

 small style. 



//'//'&,v, Meig. {DamfAlis, F;ib.), (wiih thiek Iiiud-tbi-hs), and 



0<\'/droi>iia, liufl"in. (uith llie hiiHUilii|,^lts of uidinary size), have the liist joint of the antenna' short, ovoid, or 

 conie, w ith a long seta. 



Micri'jihui-a, _Meig., has tlie third Joint of the anteniue, as well as the style, long. 



Lemliiprzn, nearly allied to (.)c>tironiia, but ^\ith the style terminal, ami not dorsal. 



Lmtis, Linn. {Empides, h^tr.), — 

 Are closely allied to Asihis in the form of Ihe body and position of the wings, but with the proboscis 

 perpendicular, or diree'led backwards. Tiie head is roniideii, nearly globular, witli the eyes greatly 

 extenilcd. The species are of small size ; live by rapine ami on Ihe honey of flowers. The last joint 

 of the antennje is alwajs terminated by a slnnt biariictilatc style, or I)y a sola. The males of some 

 species have tlie basal joint of the fore-tarsi very dilated. 



Some have 3-jointed antennae, of which the last is sometimes in the form of an elongate cone. 



J5?/?y«j proper, has the proboscis much longer than the head, the bi-articulate style at the tip of the antennx' 

 being- always short ; the jialpi alwaj s ^ecur^ ed. Emjiis iicnnipcs, Fall., remarkable for the hind legs of the feniaics 

 being very hairy. 



Ji'ii/'/i/iniiii/ia, Meig., difl'ers from Empis in wanting the small transverse nerve at the lips of the wings. 



Ill ilie following, the proboscis is scarcely longer than the head, 



Htl«r<i, Meig., has the antenna; terminated by a small 2-jointcd style. In 



Jirachiisloma, Meig., they arc terminated by a long seta. 



(Jloma, Meig., differs from the preceding in having the last joint uf the antenna' terminated by a seta, and 

 forming, with the preceding joint, a splierical iMiily. 



The rest have only (wo distinct joints in the antenna?, the last joint being ovoid or subglobose, and 

 terminated by a seta, forming the second jnint of the style. The proboscis is generally short, witii 

 the palpi resting u[M}n it. 



